8の性質
8の段（8の倍数）
- 8 × 1 = 8
- 8 × 2 = 16
- 8 × 3 = 24
- 8 × 4 = 32
- 8 × 5 = 40
- 8 × 6 = 48
- 8 × 7 = 56
- 8 × 8 = 64
- 8 × 9 = 72
- 8 × 10 = 80
- 8 × 11 = 88
- 8 × 12 = 96
- 8 × 13 = 104
- 8 × 14 = 112
- 8 × 15 = 120
- 8 × 16 = 128
- 8 × 17 = 136
- 8 × 18 = 144
- 8 × 19 = 152
- 8 × 20 = 160
- 8 × 21 = 168
- 8 × 22 = 176
- 8 × 23 = 184
- 8 × 24 = 192
- 8 × 25 = 200
- 8 × 26 = 208
- 8 × 27 = 216
- 8 × 28 = 224
- 8 × 29 = 232
- 8 × 30 = 240
- 8 × 31 = 248
- 8 × 32 = 256
- 8 × 33 = 264
- 8 × 34 = 272
- 8 × 35 = 280
- 8 × 36 = 288
- 8 × 37 = 296
- 8 × 38 = 304
- 8 × 39 = 312
- 8 × 40 = 320
- 8 × 41 = 328
- 8 × 42 = 336
- 8 × 43 = 344
- 8 × 44 = 352
- 8 × 45 = 360
- 8 × 46 = 368
- 8 × 47 = 376
- 8 × 48 = 384
- 8 × 49 = 392
- 8 × 50 = 400
- 8 × 51 = 408
- 8 × 52 = 416
- 8 × 53 = 424
- 8 × 54 = 432
- 8 × 55 = 440
- 8 × 56 = 448
- 8 × 57 = 456
- 8 × 58 = 464
- 8 × 59 = 472
- 8 × 60 = 480
- 8 × 61 = 488
- 8 × 62 = 496
- 8 × 63 = 504
- 8 × 64 = 512
- 8 × 65 = 520
- 8 × 66 = 528
- 8 × 67 = 536
- 8 × 68 = 544
- 8 × 69 = 552
- 8 × 70 = 560
- 8 × 71 = 568
- 8 × 72 = 576
- 8 × 73 = 584
- 8 × 74 = 592
- 8 × 75 = 600
- 8 × 76 = 608
- 8 × 77 = 616
- 8 × 78 = 624
- 8 × 79 = 632
- 8 × 80 = 640
- 8 × 81 = 648
- 8 × 82 = 656
- 8 × 83 = 664
- 8 × 84 = 672
- 8 × 85 = 680
- 8 × 86 = 688
- 8 × 87 = 696
- 8 × 88 = 704
- 8 × 89 = 712
- 8 × 90 = 720
- 8 × 91 = 728
- 8 × 92 = 736
- 8 × 93 = 744
- 8 × 94 = 752
- 8 × 95 = 760
- 8 × 96 = 768
- 8 × 97 = 776
- 8 × 98 = 784
- 8 × 99 = 792
- 8 × 100 = 800
小学校で習う 8 の段と 8 の倍数をまとめました。一周の角度 360 度は 8 の倍数で、1000 も 8 の倍数。こうした特殊な性質から 8 の倍数は中学受験の算数、中学校や高校の数学でもよく出てきます。
問題
8 × 19 = ( )
8 × 27 = ( )
8 × 17 = ( )
8 × 23 = ( )
8 × 25 = ( )
解答
8 × 19 = 152
8 × 27 = 216
8 × 17 = 136
8 × 23 = 184
8 × 25 = 200
