{"id":15738,"date":"2026-11-02T12:43:36","date_gmt":"2026-11-02T03:43:36","guid":{"rendered":"https:\/\/chicodori.net\/?p=15738"},"modified":"2026-11-02T12:48:39","modified_gmt":"2026-11-02T03:48:39","slug":"math-learning-links","status":"publish","type":"post","link":"https:\/\/chicodori.net\/index.php\/en\/math-learning-links\/","title":{"rendered":"Math learning links"},"content":{"rendered":"\n<style>.cd-resource-en{color:#40566a;line-height:1.8}.cd-resource-en *{box-sizing:border-box}.cd-resource-en .res-head{background:#fff7d9;border:1px solid #ecdfb2;border-radius:16px;padding:20px;margin-bottom:22px}.cd-resource-en h2{font-size:25px;line-height:1.4;margin:25px 0 14px;color:#417c9f}.cd-resource-en h3{font-size:20px;line-height:1.5;margin:16px 0 8px;color:#3d6174}.cd-resource-en p,.cd-resource-en li{font-size:18px}.cd-resource-en .res-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:14px 0 24px}.cd-resource-en .res-card{display:flex;flex-direction:column;padding:15px;border:1px solid #d2e3e8;border-radius:13px;background:#fcfefe;min-width:0}.cd-resource-en .res-card a{font-size:18px;font-weight:700;overflow-wrap:anywhere}.cd-resource-en .res-card img{width:100%;height:130px;object-fit:contain;margin-bottom:12px}.cd-resource-en .res-card small{font-size:14px;color:#74878b}.cd-resource-en .res-note{background:#f1f8fb;border:1px solid #cce0e6;border-radius:12px;padding:15px;font-size:16px}.cd-resource-en figure{margin:18px 0}.cd-resource-en figure img{display:block;max-width:100%;height:auto;margin:auto}.cd-resource-en .res-previews{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.cd-resource-en .res-downloads a{display:inline-block;padding:12px 16px;margin:6px 8px 6px 0;background:#edf7fb;border:1px solid #acd5e5;border-radius:10px;font-size:18px;font-weight:700}.cd-resource-en iframe{max-width:100%}.cd-resource-en .res-steps li{font-size:22px;margin-bottom:12px}.cd-resource-en summary{font-size:20px;cursor:pointer}.cd-resource-en nav{display:flex;gap:10px;flex-wrap:wrap}.cd-resource-en nav a{padding:7px 12px;background:#eef7fa;border-radius:8px;font-size:16px}.cd-resource-en section[id]{scroll-margin-top:80px}@media(max-width:600px){.cd-resource-en .res-grid{grid-template-columns:1fr}.cd-resource-en .res-previews{grid-template-columns:1fr}.cd-resource-en .res-head{padding:16px}.cd-resource-en .res-card img{height:110px}}<\/style><div class=\"cd-resource-en\" lang=\"en\"><header class=\"res-head\"><a href=\"https:\/\/chicodori.net\/index.php\/en\/learning-links\/\">Learning Links<\/a><p>Explore calculation, multiplication, division, fractions, number properties, units and geometry.<\/p><\/header><p>These links follow Chicodori\u2019s Japanese directory. Most destinations use Japanese. Check each site for its language, availability and terms.<\/p><section><h2>Addition &amp; subtraction<\/h2><div class=\"res-grid\"><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/add001.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/www.kumamoto-kmm.ed.jp\/kyouzai\/web\/Card10\/index.html\" target=\"_blank\" rel=\"noopener noreferrer\">Make ten<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/add002.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/sikoku.jp\/2022\/10made\/\" target=\"_blank\" rel=\"noopener noreferrer\">Monsters: calculation up to ten<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/add003.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/sikoku.jp\/2022\/99t\/\" target=\"_blank\" rel=\"noopener noreferrer\">Addition Monsters<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/add004.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/oct-kun.net\/content\/octataki\/\" target=\"_blank\" rel=\"noopener noreferrer\">OCTataki: addition and subtraction<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/add005a.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/marmooo.github.io\/tegaki-100masu\/\" target=\"_blank\" rel=\"noopener noreferrer\">Handwritten 100-square calculation<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/add006.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/net3.xsrv.jp\/2022\/gia\/\" target=\"_blank\" rel=\"noopener noreferrer\">Gear Drill<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/add007\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/www.19online.net\/am2\/\" target=\"_blank\" rel=\"noopener noreferrer\">Arithmetic Masters 2<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/02\/image-8.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/chicodori.net\/index.php\/en\/number-hunt-1\/\">Number Hunt 1<\/a><small>Chicodori resource<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/02\/image-6.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/chicodori.net\/index.php\/en\/cross-calculation-add-subtract\/\">Cross Calculation<\/a><small>Chicodori resource<\/small><\/div><\/div><\/section><section><h2>Multiplication<\/h2><div class=\"res-grid\"><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi001a.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/marmooo.github.io\/tegaki-100masu\/\" target=\"_blank\" rel=\"noopener noreferrer\">Handwritten 100-square calculation<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi002.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/net3.xsrv.jp\/2022\/gia\/\" target=\"_blank\" rel=\"noopener noreferrer\">Gear Drill<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi003.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/seipsg.main.jp\/kuku81\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kuku Juhachi<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi004.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/99master.online\/\" target=\"_blank\" rel=\"noopener noreferrer\">Multiplication Table Master<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi005.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/sikoku.jp\/2022\/99bs\/\" target=\"_blank\" rel=\"noopener noreferrer\">Multiplication Monsters<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi006.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/sikoku.jp\/2022\/99maze\/\" target=\"_blank\" rel=\"noopener noreferrer\">Mixed Multiplication Monsters<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi007.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/sikoku.jp\/2018\/18\/99-k.html\" target=\"_blank\" rel=\"noopener noreferrer\">Reverse Multiplication Monsters<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi008.png\" alt=\"\" loading=\"lazy\"><a href=\"http:\/\/www.shurey.com\/js\/craft\/kuku\/kuku.html\" target=\"_blank\" rel=\"noopener noreferrer\">Multiplication chain<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi009\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/www.19online.net\/am2\/\" target=\"_blank\" rel=\"noopener noreferrer\">Arithmetic Masters 2<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/02\/image-8.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/chicodori.net\/index.php\/en\/number-hunt-1\/\">Number Hunt 1<\/a><small>Chicodori resource<\/small><\/div><\/div><\/section><section><h2>Division<\/h2><div class=\"res-grid\"><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/divi001a.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/marmooo.github.io\/tegaki-100masu\/\" target=\"_blank\" rel=\"noopener noreferrer\">Handwritten 100-square calculation<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/divi002.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/net3.xsrv.jp\/2022\/gia\/\" target=\"_blank\" rel=\"noopener noreferrer\">Gear Drill<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/multi006.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/sikoku.jp\/2022\/99maze\/\" target=\"_blank\" rel=\"noopener noreferrer\">Mixed Multiplication Monsters<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/divi003\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/www.19online.net\/am2\/\" target=\"_blank\" rel=\"noopener noreferrer\">Arithmetic Masters 2<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/divi004.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/jp.quiz11.graphtochart.com\/play.php?q=20\" target=\"_blank\" rel=\"noopener noreferrer\">Division quiz<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/divi005.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/galboz-labo.com\/math\/math-warizan\/\" target=\"_blank\" rel=\"noopener noreferrer\">Let\u2019s do division<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><\/div><\/section><section><h2>Fractions<\/h2><div class=\"res-grid\"><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/frac001\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/net3.xsrv.jp\/2022\/gia\/\" target=\"_blank\" rel=\"noopener noreferrer\">Gear Drill<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/frac002\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/jp.quiz12.graphtochart.com\/#google_vignette\" target=\"_blank\" rel=\"noopener noreferrer\">Fractions quiz<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><\/div><\/section><section><h2>Number properties<\/h2><div class=\"res-grid\"><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/num001\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/net3.xsrv.jp\/2022\/gia\/\" target=\"_blank\" rel=\"noopener noreferrer\">Gear Drill<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><\/div><\/section><section><h2>Units<\/h2><div class=\"res-grid\"><\/div><\/section><section><h2>Geometry<\/h2><div class=\"res-grid\"><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/shapes002\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/www.kumamoto-kmm.ed.jp\/kyouzai\/web\/Jintori01\/index.html\" target=\"_blank\" rel=\"noopener noreferrer\">Area territory battle<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/shapes003\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/www.kumamoto-kmm.ed.jp\/kyouzai\/web\/HirosaKurabe\/index.html\" target=\"_blank\" rel=\"noopener noreferrer\">Compare areas<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/shapes004\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/www.kumamoto-kmm.ed.jp\/kyouzai\/web\/How-to-obtain-area\/index.html\" target=\"_blank\" rel=\"noopener noreferrer\">Different ways to find area<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><div class=\"res-card\"><img decoding=\"async\" src=\"https:\/\/chicodori.net\/wp-content\/uploads\/2024\/10\/shapes001\n.png\" alt=\"\" loading=\"lazy\"><a href=\"https:\/\/polypad.amplify.com\/ja\/p\" target=\"_blank\" rel=\"noopener noreferrer\">Polypad<\/a><small>External resource \u00b7 Japanese directory<\/small><\/div><\/div><\/section><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Explore calculation, multiplication, division, fractions, number properties, units and geometry.<\/p>\n","protected":false},"author":1,"featured_media":7891,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1987,9,13,21,25,29,15,157],"tags":[2677,2898,2981,2983],"cd_learning_unit":[],"cd_english_grade":[2536],"class_list":["post-15738","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-1987","category-9","category-13","category-21","category-25","category-29","category-15","category-links","tag--en","tag-web-en","entry","has-media"],"_links":{"self":[{"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/posts\/15738","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/comments?post=15738"}],"version-history":[{"count":3,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/posts\/15738\/revisions"}],"predecessor-version":[{"id":15783,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/posts\/15738\/revisions\/15783"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/media\/7891"}],"wp:attachment":[{"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/media?parent=15738"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/categories?post=15738"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/tags?post=15738"},{"taxonomy":"cd_learning_unit","embeddable":true,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/cd_learning_unit?post=15738"},{"taxonomy":"cd_english_grade","embeddable":true,"href":"https:\/\/chicodori.net\/index.php\/wp-json\/wp\/v2\/cd_english_grade?post=15738"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}