{"id":54,"date":"2026-05-25T15:37:41","date_gmt":"2026-05-25T06:37:41","guid":{"rendered":"https:\/\/www.risu-japan.com\/drill\/?p=54"},"modified":"2026-05-25T15:37:41","modified_gmt":"2026-05-25T06:37:41","slug":"number-zero","status":"publish","type":"drill","link":"https:\/\/www.risu-japan.com\/drill\/grade1\/up-to-10\/number-zero\/","title":{"rendered":"0\u306e\u610f\u5473\u3068\u66f8\u304d\u65b9"},"content":{"rendered":"<p><!-- body-start --><\/p>\n<h2>0\uff08\u30bc\u30ed\uff09\u3068\u306f\u306a\u306b\u304b<\/h2>\n<p>\u300c0\uff08\u30bc\u30ed\u30fb\u308c\u3044\uff09\u300d\u306f\u300c\u4f55\u3082\u306a\u3044\u300d\u3053\u3068\u3092\u8868\u3059\u5927\u5207\u306a\u6570\u3067\u3059\u30021\u304b\u308910\u307e\u3067\u306e\u6570\u3092\u5b66\u3093\u3067\u304d\u307e\u3057\u305f\u304c\u3001\u304a\u76bf\u306b\u30af\u30c3\u30ad\u30fc\u304c1\u3064\u3082\u306e\u3063\u3066\u3044\u306a\u3044\u72b6\u614b\u3092\u6570\u5b57\u3067\u8868\u3059\u3068\u304d\u3001\u300c0\u300d\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u6570\u306e\u4e26\u3073\u3067\u306f\u300c0\u300d\u304c\u4e00\u756a\u5c0f\u3055\u304f\u30011\u306e\u524d\u306b\u6765\u307e\u3059\u3002<\/p>\n<h2>0\u306e\u30eb\u30fc\u30eb<\/h2>\n<p>\u300c\u4f55\u3082\u306a\u3044\u300d\u3053\u3068\u3092\u8868\u3059\u6570\u5b57\u304c0\u3067\u3059\u3002<\/p>\n<h3>1. 0\u306f\u4e00\u756a\u5c0f\u3055\u3044\u6570<\/h3>\n<p>0\u306f\u3001\u3059\u3079\u3066\u306e\u6570\u306e\u4e2d\u3067\u4e00\u756a\u5c0f\u3055\u3044\u6570\u3067\u3059\uff080, 1, 2, 3\u2026\u306e\u9806\u306b\u5927\u304d\u304f\u306a\u308a\u307e\u3059\uff09\u3002<\/p>\n<p><!-- \u4f8b\u984c --><\/p>\n<section class=\"example-section\">\n<h2 class=\"example-section__heading\">\u4f8b\u984c<\/h2>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f1<\/h3>\n<p>\u3048\u306e \u304a\u3055\u3089\u306e \u3046\u3048\u306b \u304f\u3060\u3082\u306e\u306f \u306a\u3093\u3053 \u3042\u308a\u307e\u3059\u304b\u3002\u3059\u3046\u3058\u3067 \u304b\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/plate-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" class=\"alignnone size-medium wp-image-55\" srcset=\"https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/plate-300x300.jpg 300w, https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/plate-150x150.jpg 150w, https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/plate-768x768.jpg 768w, https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/plate.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>\n\t<\/div>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f2<\/h3>\n<p>\u3064\u304e\u306e \u304b\u305a\u3092 \u3061\u3044\u3055\u3044 \u3058\u3085\u3093\u306b \u306a\u3089\u3079\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>3\u30010\u30015\u30011<\/p>\n<\/p><\/div>\n<div class=\"explanation-block\">\n<h3 class=\"explanation-block__heading\">\u89e3\u8aac<\/h3>\n<div class=\"explanation-card\">\n<h4 class=\"explanation-card__num\">\u554f1<\/h4>\n<p>\u7b54\u3048\uff1a0<\/p>\n<p>\u304a\u76bf\u306e\u4e0a\u306e\u679c\u7269\u3092\u6570\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4eca\u56de\u306f\u304a\u76bf\u306e\u4e0a\u306b\u4f55\u3082\u306e\u3063\u3066\u3044\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u679c\u7269\u304c\u300c\u306a\u3044\u300d\u3068\u3044\u3046\u3053\u3068\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u679c\u7269\u306e\u6570\u306f\u300c\u4f55\u3082\u306a\u3044\u300d\u3053\u3068\u3092\u8868\u3059\u300c0\u300d\u3092\u7528\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u679c\u7269\u306e\u6570\u306f0\u3053\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/p><\/div>\n<div class=\"explanation-card\">\n<h4 class=\"explanation-card__num\">\u554f2<\/h4>\n<p>\u7b54\u3048\uff1a\u300c0\u300d\u300c1\u300d\u300c3\u300d\u300c5\u300d<\/p>\n<p>\u307e\u305a\u306f1\u301c5\u307e\u3067\u306e\u6570\u5b57\u3092\u5c0f\u3055\u3044\u9806\u306b\u4e26\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u300c1\u30fb2\u30fb3\u30fb4\u30fb5\u300d\u3068\u306a\u308b\u306e\u3067\u3053\u306e\u554f\u984c\u3067\u306f\u300c1\u300d\u300c3\u300d\u300c5\u300d\u3068\u3044\u3046\u9806\u756a\u306b\u306a\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u300c0\u300d\u306f\u300c\u4f55\u3082\u306a\u3044\u300d\u3053\u3068\u3092\u8868\u3059\u306e\u30671\u3088\u308a\u3082\u5c0f\u3055\u3044\u6570\u3067\u3059\u3002\u3064\u307e\u308a1\u306e\u524d\u306b\u6765\u308b\u306e\u3067\u300c0\u300d\u300c1\u300d\u300c3\u300d\u300c5\u300d\u3068\u3044\u3046\u9806\u756a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n<p><!-- \u7df4\u7fd2\u554f\u984c --><\/p>\n<section class=\"practice-problems\">\n<h2>\u7df4\u7fd2\u554f\u984c<\/h2>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f1<\/h3>\n<p>\u306f\u3053\u306e \u306a\u304b\u306b \u30dc\u30fc\u30eb\u306f \u306a\u3093\u3053 \u306f\u3044\u3063\u3066 \u3044\u307e\u3059\u304b\u3002\u3059\u3046\u3058\u3067 \u304b\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/empty-box-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" class=\"alignnone size-medium wp-image-56\" srcset=\"https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/empty-box-300x300.jpg 300w, https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/empty-box-150x150.jpg 150w, https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/empty-box-768x768.jpg 768w, https:\/\/www.risu-japan.com\/drill\/wp-content\/uploads\/2026\/05\/empty-box.jpg 800w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/>\n\t<\/div>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f2<\/h3>\n<p>\u3064\u304e\u306e \u25a1\u306b \u3042\u3046 \u304b\u305a\u3092 \u304b\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u25a1\u30011\u30012\u30013\u30014\u30015<\/p>\n<\/p><\/div>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f3<\/h3>\n<p>\u3064\u304e\u306e \u304b\u305a\u306e \u306a\u304b\u3067\u3001\u3044\u3061\u3070\u3093 \u3061\u3044\u3055\u3044 \u304b\u305a\u306f \u3069\u308c\u3067\u3059\u304b\u3002<\/p>\n<p>2\u30017\u30010\u30014<\/p>\n<\/p><\/div>\n<\/section>\n<p><!-- \u5fdc\u7528\u554f\u984c --><\/p>\n<section class=\"advanced-problems\">\n<h2>\u5fdc\u7528\u554f\u984c<\/h2>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f1<\/h3>\n<p>\u304d\u3093\u304e\u3087\u3070\u3061\u306b \u304d\u3093\u304e\u3087\u304c 3\u3073\u304d \u3044\u307e\u3057\u305f\u3002\u305c\u3093\u3076 \u3079\u3064\u306e \u306f\u3061\u306b \u3046\u3064\u3057\u307e\u3057\u305f\u3002\u3082\u3068\u306e \u304d\u3093\u304e\u3087\u3070\u3061\u306b\u306f \u3044\u307e \u306a\u3093\u3073\u304d \u3044\u307e\u3059\u304b\u3002<\/p>\n<\/p><\/div>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f2<\/h3>\n<p>0\u306f \u304b\u305a \u3067\u3059\u304b\u3002\u308a\u3086\u3046\u3082 \u304b\u3093\u304c\u3048\u3066 \u3053\u305f\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/p><\/div>\n<div class=\"problem-card\">\n<h3 class=\"problem-card__num\">\u554f3<\/h3>\n<p>\u3064\u304e\u306e \u304b\u305a\u3092 \u304a\u304a\u304d\u3044 \u3058\u3085\u3093\u306b \u306a\u3089\u3079\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>8\u30013\u30010\u30015<\/p>\n<\/p><\/div>\n<\/section>\n<p><!-- \u89e3\u7b54\u3068\u89e3\u8aac --><\/p>\n<section class=\"answer-section\">\n<h2>\u89e3\u7b54\u3068\u89e3\u8aac<\/h2>\n<div class=\"answer-group answer-group--practice\">\n<h3>\u7df4\u7fd2\u554f\u984c<\/h3>\n<div class=\"explanation-card\">\n<h4 class=\"explanation-card__num\">\u554f1<\/h4>\n<p>\u7b54\u3048\uff1a0<\/p>\n<p>\u7bb1\u306e\u4e2d\u306e\u30dc\u30fc\u30eb\u306e\u6570\u306f\u3044\u304f\u3064\u304b\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u7bb1\u306e\u4e2d\u306b\u306f\u30dc\u30fc\u30eb\u304c\u5165\u3063\u3066\u3044\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u30dc\u30fc\u30eb\u304c\u300c\u306a\u3044\u300d\u3068\u3044\u3046\u3053\u3068\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u30dc\u30fc\u30eb\u306e\u6570\u306f\u300c\u4f55\u3082\u306a\u3044\u300d\u3053\u3068\u3092\u8868\u3059\u300c0\u300d\u3092\u7528\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u30dc\u30fc\u30eb\u306e\u6570\u306f0\u3053\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/p><\/div>\n<div class=\"explanation-card\">\n<h4 class=\"explanation-card__num\">\u554f2<\/h4>\n<p>\u7b54\u3048\uff1a0<\/p>\n<p>\u3053\u306e\u554f\u984c\u3067\u306f\u6570\u304c \u25a1\u30011\u30012\u30013\u30014\u30015\u3068\u4e26\u3093\u3067\u3044\u307e\u3059\u306d\u3002\u25a1\u306b\u5f53\u3066\u306f\u307e\u308b\u306e\u306f1\u3088\u308a\u5c0f\u3055\u3044\u6570\u3067\u306a\u3044\u3068\u3044\u3051\u307e\u305b\u3093\u3002\u3064\u307e\u308a\u6570\u306e\u4e26\u3073\u3067\u4e00\u756a\u5c0f\u3055\u3044\u300c0\u300d\u304c\u3053\u306e\u554f\u984c\u306e\u7b54\u3048\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/p><\/div>\n<div class=\"explanation-card\">\n<h4 class=\"explanation-card__num\">\u554f3<\/h4>\n<p>\u7b54\u3048\uff1a0<\/p>\n<p>\u307e\u305a\u306f1\u301c10\u307e\u3067\u306e\u6570\u5b57\u3092\u5c0f\u3055\u3044\u9806\u306b\u4e26\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u300c1\u30fb2\u30fb3\u30fb4\u30fb5\u30fb6\u30fb7\u30fb8\u30fb9\u30fb10\u300d\u3068\u306a\u308b\u306e\u3067\u3053\u308c\u3092\u53c2\u8003\u306b\u3059\u308b\u3068\u3001\u4eca\u56de\u306e\u554f\u984c\u3067\u306f\u300c2\u300d\u300c4\u300d\u300c7\u300d\u3068\u3044\u3046\u9806\u756a\u306b\u306a\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u300c0\u300d\u306f\u300c\u4f55\u3082\u306a\u3044\u300d\u3053\u3068\u3092\u8868\u3059\u306e\u3067\u3053\u306e\u4e2d\u3067\u4e00\u756a\u5c0f\u3055\u3044\u6570\u3067\u3059\u3002\u3088\u3063\u3066\u300c0\u300d\u300c2\u300d\u300c4\u300d\u300c7\u300d\u3068\u3044\u3046\u9806\u756a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<div class=\"answer-group answer-group--advanced\">\n<h3>\u5fdc\u7528\u554f\u984c<\/h3>\n<div class=\"explanation-card\">\n<h4 class=\"explanation-card__num\">\u554f1<\/h4>\n<p>\u7b54\u3048\uff1a0<\/p>\n<p>\u6700\u521d\u91d1\u9b5a\u9262\u306b\u91d1\u9b5a\u304c3\u5339\u3044\u3066\u3001\u305d\u3053\u304b\u3089\u5168\u90e8\u5225\u306e\u9262\u306b\u79fb\u3057\u305f\u3068\u3044\u3046\u3053\u3068\u306f\u5143\u306e\u91d1\u9b5a\u9262\u306b\u306f\u91d1\u9b5a\u304c\u300c\u3044\u306a\u3044\u300d\u72b6\u614b\u306b\u306a\u3063\u3066\u3044\u308b\u3068\u3044\u3046\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u300c\u4f55\u3082\u306a\u3044\u300d\u3092\u8868\u30590\u5339\u304c\u7b54\u3048\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u554f\u984c\u3067\u306f\u81ea\u5206\u3067\u7d75\u3092\u63cf\u3044\u3066\u8003\u3048\u308b\u3068\u3088\u308a\u5206\u304b\u308a\u3084\u3059\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u306d\u3002<\/p>\n<\/p><\/div>\n<div class=\"explanation-card\">\n<h4 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class=\"explanation-card\">\n<h4 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