6の性質
かけ算6の段（6の倍数とその判定法）
- 6 × 1 = 6
- 6 × 2 = 12
- 6 × 3 = 18
- 6 × 4 = 24
- 6 × 5 = 30
- 6 × 6 = 36
- 6 × 7 = 42
- 6 × 8 = 48
- 6 × 9 = 54
- 6 × 10 = 60
- 6 × 11 = 66
- 6 × 12 = 72
- 6 × 13 = 78
- 6 × 14 = 84
- 6 × 15 = 90
- 6 × 16 = 96
- 6 × 17 = 102
- 6 × 18 = 108
- 6 × 19 = 114
- 6 × 20 = 120
- 6 × 21 = 126
- 6 × 22 = 132
- 6 × 23 = 138
- 6 × 24 = 144
- 6 × 25 = 150
- 6 × 26 = 156
- 6 × 27 = 162
- 6 × 28 = 168
- 6 × 29 = 174
- 6 × 30 = 180
- 6 × 31 = 186
- 6 × 32 = 192
- 6 × 33 = 198
- 6 × 34 = 204
- 6 × 35 = 210
- 6 × 36 = 216
- 6 × 37 = 222
- 6 × 38 = 228
- 6 × 39 = 234
- 6 × 40 = 240
- 6 × 41 = 246
- 6 × 42 = 252
- 6 × 43 = 258
- 6 × 44 = 264
- 6 × 45 = 270
- 6 × 46 = 276
- 6 × 47 = 282
- 6 × 48 = 288
- 6 × 49 = 294
- 6 × 50 = 300
- 6 × 51 = 306
- 6 × 52 = 312
- 6 × 53 = 318
- 6 × 54 = 324
- 6 × 55 = 330
- 6 × 56 = 336
- 6 × 57 = 342
- 6 × 58 = 348
- 6 × 59 = 354
- 6 × 60 = 360
- 6 × 61 = 366
- 6 × 62 = 372
- 6 × 63 = 378
- 6 × 64 = 384
- 6 × 65 = 390
- 6 × 66 = 396
- 6 × 67 = 402
- 6 × 68 = 408
- 6 × 69 = 414
- 6 × 70 = 420
- 6 × 71 = 426
- 6 × 72 = 432
- 6 × 73 = 438
- 6 × 74 = 444
- 6 × 75 = 450
- 6 × 76 = 456
- 6 × 77 = 462
- 6 × 78 = 468
- 6 × 79 = 474
- 6 × 80 = 480
- 6 × 81 = 486
- 6 × 82 = 492
- 6 × 83 = 498
- 6 × 84 = 504
- 6 × 85 = 510
- 6 × 86 = 516
- 6 × 87 = 522
- 6 × 88 = 528
- 6 × 89 = 534
- 6 × 90 = 540
- 6 × 91 = 546
- 6 × 92 = 552
- 6 × 93 = 558
- 6 × 94 = 564
- 6 × 95 = 570
- 6 × 96 = 576
- 6 × 97 = 582
- 6 × 98 = 588
- 6 × 99 = 594
- 6 × 100 = 600
6 の倍数の判定法
2 の倍数であり、かつ 3 の倍数であれば、その数は 6 の倍数になります。つまり
- 一の位が偶数
- 各位の和が 3 の倍数
であれば、その数は 6 の倍数です。この「6 の倍数の判定法」はとても有名で、中学受験の算数でよく題材になります。
例 9744
- 一の位（4）は偶数
- 各位の和（9 + 7 + 4 + 4 = 24）は 3 の倍数
よって 9744 は 6 の倍数。
問題
6 × 29 = ( )
6 × 21 = ( )
6 × 14 = ( )
6 × 27 = ( )
6 × 18 = ( )
解答
6 × 29 = 174
6 × 21 = 126
6 × 14 = 84
6 × 27 = 162
6 × 18 = 108
