15の性質
かけ算15の段 15倍の簡単なやり方
- 15 × 1 = 15
- 15 × 2 = 30
- 15 × 3 = 45
- 15 × 4 = 60
- 15 × 5 = 75
- 15 × 6 = 90
- 15 × 7 = 105
- 15 × 8 = 120
- 15 × 9 = 135
- 15 × 10 = 150
- 15 × 11 = 165
- 15 × 12 = 180
- 15 × 13 = 195
- 15 × 14 = 210
- 15 × 15 = 225
- 15 × 16 = 240
- 15 × 17 = 255
- 15 × 18 = 270
- 15 × 19 = 285
- 15 × 20 = 300
- 15 × 21 = 315
- 15 × 22 = 330
- 15 × 23 = 345
- 15 × 24 = 360
- 15 × 25 = 375
- 15 × 26 = 390
- 15 × 27 = 405
- 15 × 28 = 420
- 15 × 29 = 435
- 15 × 30 = 450
- 15 × 31 = 465
- 15 × 32 = 480
- 15 × 33 = 495
- 15 × 34 = 510
- 15 × 35 = 525
- 15 × 36 = 540
- 15 × 37 = 555
- 15 × 38 = 570
- 15 × 39 = 585
- 15 × 40 = 600
- 15 × 41 = 615
- 15 × 42 = 630
- 15 × 43 = 645
- 15 × 44 = 660
- 15 × 45 = 675
- 15 × 46 = 690
- 15 × 47 = 705
- 15 × 48 = 720
- 15 × 49 = 735
- 15 × 50 = 750
- 15 × 51 = 765
- 15 × 52 = 780
- 15 × 53 = 795
- 15 × 54 = 810
- 15 × 55 = 825
- 15 × 56 = 840
- 15 × 57 = 855
- 15 × 58 = 870
- 15 × 59 = 885
- 15 × 60 = 900
- 15 × 61 = 915
- 15 × 62 = 930
- 15 × 63 = 945
- 15 × 64 = 960
- 15 × 65 = 975
- 15 × 66 = 990
- 15 × 67 = 1005
- 15 × 68 = 1020
- 15 × 69 = 1035
- 15 × 70 = 1050
- 15 × 71 = 1065
- 15 × 72 = 1080
- 15 × 73 = 1095
- 15 × 74 = 1110
- 15 × 75 = 1125
- 15 × 76 = 1140
- 15 × 77 = 1155
- 15 × 78 = 1170
- 15 × 79 = 1185
- 15 × 80 = 1200
- 15 × 81 = 1215
- 15 × 82 = 1230
- 15 × 83 = 1245
- 15 × 84 = 1260
- 15 × 85 = 1275
- 15 × 86 = 1290
- 15 × 87 = 1305
- 15 × 88 = 1320
- 15 × 89 = 1335
- 15 × 90 = 1350
- 15 × 91 = 1365
- 15 × 92 = 1380
- 15 × 93 = 1395
- 15 × 94 = 1410
- 15 × 95 = 1425
- 15 × 96 = 1440
- 15 × 97 = 1455
- 15 × 98 = 1470
- 15 × 99 = 1485
- 15 × 100 = 1500
15 の倍数は、15 にかける数を半分した値をその数に足して 10 倍すると求まります。
例えば 15 に 18 をかける場合、18 に 18 を半分した 9 を足して 27 にする。それを 10 倍して 270 が求まる。
18 → 9
18 + 9 = 27
15 × 18 = 270
