{"id":425,"date":"2026-06-23T11:52:44","date_gmt":"2026-06-23T02:52:44","guid":{"rendered":"https:\/\/www.risu-japan.com\/drill\/?p=425"},"modified":"2026-06-23T11:52:44","modified_gmt":"2026-06-23T02:52:44","slug":"length-addition-subtraction","status":"publish","type":"drill","link":"https:\/\/www.risu-japan.com\/drill\/grade2\/length\/length-addition-subtraction\/","title":{"rendered":"\u9577\u3055\u306e\u8db3\u3057\u7b97\u30fb\u5f15\u304d\u7b97"},"content":{"rendered":"

<\/p>\n

\u9577\u3055\u306e \u8db3\u3057\u7b97\u30fb\u5f15\u304d\u7b97\u3068\u306f<\/h2>\n

\u9577\u3055\u3092\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\u3059\u308b\u8a08\u7b97\u3067\u3059\u3002\u5927\u5207\u306a\u306e\u306f\u300ccm<\/mtext><\/math><\/span> \u306f cm<\/mtext><\/math><\/span> \u540c\u58eb\u3001mm<\/mtext><\/math><\/span> \u306f mm<\/mtext><\/math><\/span> \u540c\u58eb\u3067\u8a08\u7b97\u3059\u308b\u300d\u3068\u3044\u3046\u30eb\u30fc\u30eb\u3067\u3059\u3002\u5358\u4f4d\u304c\u9055\u3046\u6570\u5b57\u3092\u8db3\u3057\u3066\u3057\u307e\u3046\uff08\u4f8b\uff1a3<\/mn>cm<\/mtext>+<\/mo>5<\/mn>mm<\/mtext>=<\/mo>8<\/mn>cm<\/mtext><\/math><\/span> \u3068\u3057\u3066\u3057\u307e\u3046\uff09\u306e\u3092\u9632\u304e\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u8a08\u7b97\u306e\u30eb\u30fc\u30eb<\/h2>\n

1. \u540c\u3058\u5358\u4f4d\u540c\u58eb\u3067\u8a08\u7b97\u3059\u308b<\/h3>\n

\u540c\u3058\u5358\u4f4d\u306e\u6570\u540c\u58eb\u3092\u8db3\u3057\u305f\u308a\u5f15\u3044\u305f\u308a\u3057\u307e\u3059\u3002\uff08cm<\/mtext><\/math><\/span> \u3068 cm<\/mtext><\/math><\/span>\u3001mm<\/mtext><\/math><\/span> \u3068 mm<\/mtext><\/math><\/span>\uff09<\/p>\n

2. mm \u306e\u304f\u308a\u4e0a\u304c\u308a<\/h3>\n

mm<\/mtext><\/math><\/span> \u540c\u58eb\u3092\u8db3\u3057\u3066 10<\/mn>mm<\/mtext><\/math><\/span> \u3092\u8d85\u3048\u305f\u3089\u300110<\/mn>mm<\/mtext><\/math><\/span> \u3092 1<\/mn>cm<\/mtext><\/math><\/span> \u306b\u5909\u3048\u3066\uff08\u304f\u308a\u4e0a\u3052\u3066\uff09\u3001cm<\/mtext><\/math><\/span> \u306e\u65b9\u306b\u8db3\u3057\u307e\u3059\u3002<\/p>\n

3. mm \u306e\u304f\u308a\u4e0b\u304c\u308a<\/h3>\n

cm<\/mtext><\/math><\/span> \u540c\u58eb\u3092\u5f15\u304f\u3068\u304d\u3001mm<\/mtext><\/math><\/span> \u304c\u8db3\u308a\u306a\u3044\u5834\u5408\u306f\u30011<\/mn>cm<\/mtext><\/math><\/span> \u3092 10<\/mn>mm<\/mtext><\/math><\/span> \u306b\u5909\u3048\u3066\uff08\u304f\u308a\u4e0b\u3052\u3066\uff09\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n

<\/p>\n

\n

\u4f8b\u984c<\/h2>\n
\n

\u554f1<\/h3>\n

\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

2<\/mn>cm<\/mtext>+<\/mo>3<\/mn>cm<\/mtext>=<\/mo><\/math><\/div>\n<\/p><\/div>\n
\n

\u554f2<\/h3>\n

\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

4<\/mn>cm<\/mtext>2<\/mn>mm<\/mtext>+<\/mo>3<\/mn>cm<\/mtext>=<\/mo><\/math><\/div>\n<\/p><\/div>\n
\n

\u89e3\u8aac<\/h3>\n
\n

\u554f1<\/h4>\n

\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u306f\u540c\u3058\u5358\u4f4d\u540c\u58eb\u3067\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4eca\u56de\u306f\u3069\u3061\u3089\u3082\u300ccm<\/mtext><\/math><\/span>\u300d\u306a\u306e\u3067 2<\/mn>+<\/mo>3<\/mn><\/math><\/span> \u3092\u8a08\u7b97\u3057\u3066\u300c2<\/mn><\/math><\/span>\u300dcm<\/mtext><\/math><\/span> \uff0b\u300c3<\/mn><\/math><\/span>\u300dcm<\/mtext><\/math><\/span> \uff1d\u300c5<\/mn><\/math><\/span>\u300dcm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u5358\u4f4d\u306b\u6c17\u3092\u3064\u3051\u3066\u554f\u984c\u306b\u53d6\u308a\u7d44\u3093\u3067\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u7b54\u3048\uff1a5<\/mn>cm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n
\n

\u554f2<\/h4>\n

\u4eca\u56de\u306f\u5358\u4f4d\u304c2\u3064\u51fa\u3066\u304f\u308b\u306e\u3067\u540c\u3058\u5358\u4f4d\u306b\u6ce8\u76ee\u3057\u3066\u8a08\u7b97\u3057\u307e\u3059\u3002\u300ccm<\/mtext><\/math><\/span>\u300d\u3068\u300cmm<\/mtext><\/math><\/span>\u300d\u3067\u5206\u3051\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u300ccm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3059\u308b\u3068\u30014<\/mn>+<\/mo>3<\/mn>=<\/mo>7<\/mn><\/math><\/span>\u3002\u300cmm<\/mtext><\/math><\/span>\u300d\u306f 2<\/mn>mm<\/mtext><\/math><\/span> \u3068\u5206\u304b\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u7b54\u3048\u306f 7<\/mn>cm<\/mtext>2<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u7b54\u3048\uff1a7<\/mn>cm<\/mtext>2<\/mn>mm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

\u7df4\u7fd2\u554f\u984c<\/h2>\n
\n

\u554f1<\/h3>\n

\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

4<\/mn>cm<\/mtext>1<\/mn>mm<\/mtext>+<\/mo>5<\/mn>mm<\/mtext>=<\/mo><\/math><\/div>\n<\/p><\/div>\n
\n

\u554f2<\/h3>\n

\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

7<\/mn>cm<\/mtext>6<\/mn>mm<\/mtext>–<\/mo>3<\/mn>cm<\/mtext>=<\/mo><\/math><\/div>\n<\/p><\/div>\n
\n

\u554f3<\/h3>\n

\u8d64\u3044 \u30c6\u30fc\u30d7\u306f 8<\/mn>cm<\/mtext>5<\/mn>mm<\/mtext><\/math><\/span>\u3001\u9752\u3044 \u30c6\u30fc\u30d7\u306f 4<\/mn>cm<\/mtext>2<\/mn>mm<\/mtext><\/math><\/span> \u3067\u3059\u3002\u3061\u304c\u3044\u306f \u4f55cm \u4f55mm\u3067\u3059\u304b\u3002<\/p>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

\u5fdc\u7528\u554f\u984c<\/h2>\n
\n

\u554f1<\/h3>\n

\u304f\u308a\u4e0a\u304c\u308a\u304c \u3042\u308a\u307e\u3059\u3002\u6c17\u3092 \u3064\u3051\u3066\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

3<\/mn>cm<\/mtext>6<\/mn>mm<\/mtext>+<\/mo>5<\/mn>mm<\/mtext>=<\/mo><\/math><\/div>\n<\/p><\/div>\n
\n

\u554f2<\/h3>\n

\u304f\u308a\u4e0b\u304c\u308a\u304c \u3042\u308a\u307e\u3059\u3002\u6c17\u3092 \u3064\u3051\u3066\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n

5<\/mn>cm<\/mtext>2<\/mn>mm<\/mtext>–<\/mo>8<\/mn>mm<\/mtext>=<\/mo><\/math><\/div>\n<\/p><\/div>\n
\n

\u554f3<\/h3>\n

\u65b0\u3057\u3044 \u3048\u3093\u3074\u3064\u306f 18<\/mn>cm<\/mtext><\/math><\/span> \u3042\u308a\u307e\u3057\u305f\u3002\u4f55\u65e5\u304b \u3064\u304b\u3063\u305f\u3089\u300112<\/mn>cm<\/mtext>5<\/mn>mm<\/mtext><\/math><\/span> \u306b \u306a\u308a\u307e\u3057\u305f\u3002\u3064\u304b\u3063\u305f \u9577\u3055\u306f \u3069\u308c\u304f\u3089\u3044 \u3067\u3059\u304b\u3002<\/p>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

\u89e3\u7b54\u3068\u89e3\u8aac<\/h2>\n
\n

\u7df4\u7fd2\u554f\u984c<\/h3>\n
\n

\u554f1<\/h4>\n

\u5358\u4f4d\u304c2\u3064\u51fa\u3066\u304f\u308b\u306e\u3067\u540c\u3058\u5358\u4f4d\u306b\u6ce8\u76ee\u3057\u3066\u8a08\u7b97\u3057\u3066\u307f\u307e\u3059\u3002\u300ccm<\/mtext><\/math><\/span>\u300d\u3068\u300cmm<\/mtext><\/math><\/span>\u300d\u3067\u5206\u3051\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u300cmm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3059\u308b\u3068\u30011<\/mn>+<\/mo>5<\/mn>=<\/mo>6<\/mn><\/math><\/span>\u3002\u300ccm<\/mtext><\/math><\/span>\u300d\u306f 4<\/mn>cm<\/mtext><\/math><\/span> \u3068\u5206\u304b\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u7b54\u3048\u306f 4<\/mn>cm<\/mtext>6<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u7b54\u3048\uff1a4<\/mn>cm<\/mtext>6<\/mn>mm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n
\n

\u554f2<\/h4>\n

\u5f15\u304d\u7b97\u3082\u8db3\u3057\u7b97\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u540c\u3058\u5358\u4f4d\u306b\u6ce8\u76ee\u3057\u3066\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u300ccm<\/mtext><\/math><\/span>\u300d\u3068\u300cmm<\/mtext><\/math><\/span>\u300d\u3067\u5206\u3051\u3066\u307f\u307e\u3059\u3002\u300ccm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3059\u308b\u3068\u30017<\/mn>–<\/mo>3<\/mn>=<\/mo>4<\/mn><\/math><\/span>\u3002\u300cmm<\/mtext><\/math><\/span>\u300d\u306f 6<\/mn>mm<\/mtext><\/math><\/span> \u3068\u5206\u304b\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u7b54\u3048\u306f 4<\/mn>cm<\/mtext>6<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u7b54\u3048\uff1a4<\/mn>cm<\/mtext>6<\/mn>mm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n
\n

\u554f3<\/h4>\n

\u8d64\u3044\u30c6\u30fc\u30d7\u3068\u9752\u3044\u30c6\u30fc\u30d7\u306e\u9577\u3055\u306e\u9055\u3044\u3092\u6c42\u3081\u305f\u3044\u306e\u3067\u3001\u5f15\u304d\u7b97\u3092\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u540c\u3058\u5358\u4f4d\u306b\u6ce8\u76ee\u3057\u3066\u8a08\u7b97\u3057\u3066\u307f\u307e\u3059\u3002\u300ccm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3059\u308b\u3068\u30018<\/mn>–<\/mo>4<\/mn>=<\/mo>4<\/mn><\/math><\/span>\u3002\u300cmm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3059\u308b\u3068\u30015<\/mn>–<\/mo>2<\/mn>=<\/mo>3<\/mn><\/math><\/span> \u3068\u306a\u308b\u306e\u3067\u3001\u7b54\u3048\u306f 4<\/mn>cm<\/mtext>3<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u7b54\u3048\uff1a4<\/mn>cm<\/mtext>3<\/mn>mm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n<\/p><\/div>\n
\n

\u5fdc\u7528\u554f\u984c<\/h3>\n
\n

\u554f1<\/h4>\n

\u300ccm<\/mtext><\/math><\/span>\u300d\u3068\u300cmm<\/mtext><\/math><\/span>\u300d\u306b\u5206\u3051\u3066\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u306f\u300cmm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3057\u3066\u307f\u307e\u3059\u30026<\/mn>+<\/mo>5<\/mn>=<\/mo>11<\/mn><\/math><\/span> \u3088\u308a\u3001\u304f\u308a\u4e0a\u304c\u308a\u304c\u767a\u751f\u3057\u307e\u3059\u306d\u3002\u3053\u306e\u5834\u5408\u306f 11<\/mn>mm<\/mtext>=<\/mo>1<\/mn>cm<\/mtext>1<\/mn>mm<\/mtext><\/math><\/span> \u3067\u3042\u308b\u3053\u3068\u3092\u601d\u3044\u51fa\u3057\u3066\u3001\u300ccm<\/mtext><\/math><\/span>\u300d\u306e\u8db3\u3057\u7b97\u306b 1<\/mn><\/math><\/span> \u3092\u8db3\u3057\u3066\u3042\u3052\u307e\u3057\u3087\u3046\u3002\u3059\u308b\u3068\u30013<\/mn>+<\/mo>1<\/mn>=<\/mo>4<\/mn><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002\u3088\u3063\u3066\u7b54\u3048\u306f 4<\/mn>cm<\/mtext>1<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u7b54\u3048\uff1a4<\/mn>cm<\/mtext>1<\/mn>mm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n
\n

\u554f2<\/h4>\n

\u300ccm<\/mtext><\/math><\/span>\u300d\u3068\u300cmm<\/mtext><\/math><\/span>\u300d\u306b\u5206\u3051\u3066\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u306f\u300cmm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3057\u3066\u307f\u307e\u3059\u30022<\/mn>–<\/mo>8<\/mn><\/math><\/span> \u306f\u8a08\u7b97\u3067\u304d\u306a\u3044\u306e\u3067\u304f\u308a\u4e0b\u304c\u308a\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u306d\u3002\u3088\u3063\u3066 5<\/mn>cm<\/mtext><\/math><\/span> \u304b\u3089 1<\/mn>cm<\/mtext><\/math><\/span> \u3092\u501f\u308a\u3066\u300112<\/mn>–<\/mo>8<\/mn><\/math><\/span> \u3092\u8a08\u7b97\u3057\u3066\u307f\u308b\u3068\u3001\u300cmm<\/mtext><\/math><\/span>\u300d\u306f 12<\/mn>–<\/mo>8<\/mn>=<\/mo>4<\/mn><\/math><\/span> \u3067 4<\/mn>mm<\/mtext><\/math><\/span> \u3067\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u6b21\u306b\u300ccm<\/mtext><\/math><\/span>\u300d\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u304f\u308a\u4e0b\u304c\u308a\u5206\u3067 1<\/mn><\/math><\/span> \u3092\u5f15\u3044\u305f\u306e\u3067\u3001\u300ccm<\/mtext><\/math><\/span>\u300d\u306f 4<\/mn>cm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002\u3088\u3063\u3066\u7b54\u3048\u306f 4<\/mn>cm<\/mtext>4<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u7b54\u3048\uff1a4<\/mn>cm<\/mtext>4<\/mn>mm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n
\n

\u554f3<\/h4>\n

\u65b0\u3057\u3044\u925b\u7b46 18<\/mn>cm<\/mtext><\/math><\/span> \u304b\u3089\u3044\u304f\u3064\u304b\u4f7f\u3046\u3068 12<\/mn>cm<\/mtext>5<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308b\u306e\u3067\u3001\u4f7f\u3063\u305f\u9577\u3055\u306f\u5f15\u304d\u7b97\u3067\u6c42\u3081\u3089\u308c\u307e\u3059\u306d\u3002\u3088\u3063\u3066 18<\/mn>cm<\/mtext>–<\/mo>12<\/mn>cm<\/mtext>5<\/mn>mm<\/mtext><\/math><\/span> \u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u307e\u305a\u306f\u300cmm<\/mtext><\/math><\/span>\u300d\u540c\u58eb\u3067\u8a08\u7b97\u3057\u3066\u307f\u307e\u3059\u30020<\/mn>–<\/mo>5<\/mn><\/math><\/span> \u306f\u8a08\u7b97\u3067\u304d\u306a\u3044\u306e\u3067\u304f\u308a\u4e0b\u304c\u308a\u3092\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u306d\u3002\u3088\u3063\u3066 18<\/mn>cm<\/mtext><\/math><\/span> \u304b\u3089 1<\/mn>cm<\/mtext><\/math><\/span> \u3092\u501f\u308a\u3066\u300110<\/mn>–<\/mo>5<\/mn>=<\/mo>5<\/mn><\/math><\/span> \u3088\u308a\u300cmm<\/mtext><\/math><\/span>\u300d\u306f 5<\/mn>mm<\/mtext><\/math><\/span> \u3067\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u6b21\u306b\u300ccm<\/mtext><\/math><\/span>\u300d\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u304f\u308a\u4e0b\u304c\u308a\u5206\u3067 1<\/mn><\/math><\/span> \u3092\u5f15\u3044\u305f\u306e\u3067\u300117<\/mn>–<\/mo>12<\/mn>=<\/mo>5<\/mn><\/math><\/span> \u3067 5<\/mn>cm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002\u3088\u3063\u3066\u7b54\u3048\u306f 5<\/mn>cm<\/mtext>5<\/mn>mm<\/mtext><\/math><\/span> \u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u7b54\u3048\uff1a5<\/mn>cm<\/mtext>5<\/mn>mm<\/mtext><\/math><\/span><\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/section>\n

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