Subtraction Trick Worksheet
The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.
NameDateTime takenScore ___ / 40
- 1.286 − 28 =
- 2.337 − 48 =
- 3.475 − 16 =
- 4.367 − 38 =
- 5.480 − 96 =
- 6.513 − 88 =
- 7.566 − 79 =
- 8.494 − 16 =
- 9.95 − 89 =
- 10.272 − 69 =
- 11.380 − 16 =
- 12.559 − 79 =
- 13.413 − 89 =
- 14.450 − 86 =
- 15.219 − 58 =
- 16.300 − 78 =
- 17.152 − 47 =
- 18.576 − 56 =
- 19.232 − 46 =
- 20.471 − 46 =
- 21.252 − 66 =
- 22.474 − 19 =
- 23.405 − 76 =
- 24.333 − 78 =
- 25.308 − 99 =
- 26.116 − 48 =
- 27.217 − 38 =
- 28.157 − 66 =
- 29.206 − 36 =
- 30.137 − 57 =
- 31.204 − 19 =
- 32.322 − 38 =
- 33.283 − 36 =
- 34.311 − 19 =
- 35.116 − 49 =
- 36.503 − 88 =
- 37.524 − 29 =
- 38.520 − 28 =
- 39.547 − 29 =
- 40.128 − 16 =
Answer key
- 258
- 289
- 459
- 329
- 384
- 425
- 487
- 478
- 6
- 203
- 364
- 480
- 324
- 364
- 161
- 222
- 105
- 520
- 186
- 425
- 186
- 455
- 329
- 255
- 209
- 68
- 179
- 91
- 170
- 80
- 185
- 284
- 247
- 292
- 67
- 415
- 495
- 492
- 518
- 112
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths