Subtraction by Counting Up Worksheet
How to do it in your head (Count up): Start at the smaller number. Jump to the next ten, then the next hundred, then to the bigger number. Add up all the jumps.
NameDateTime takenScore ___ / 40
- 1.102 − 89 =
- 2.58 − 40 =
- 3.524 − 496 =
- 4.58 − 48 =
- 5.108 − 76 =
- 6.322 − 298 =
- 7.327 − 280 =
- 8.1013 − 981 =
- 9.304 − 297 =
- 10.130 − 78 =
- 11.92 − 68 =
- 12.322 − 277 =
- 13.216 − 191 =
- 14.312 − 278 =
- 15.65 − 27 =
- 16.88 − 66 =
- 17.51 − 30 =
- 18.101 − 78 =
- 19.504 − 491 =
- 20.303 − 288 =
- 21.57 − 26 =
- 22.1005 − 990 =
- 23.65 − 46 =
- 24.310 − 288 =
- 25.109 − 70 =
- 26.1003 − 980 =
- 27.319 − 287 =
- 28.57 − 30 =
- 29.109 − 97 =
- 30.70 − 46 =
- 31.102 − 74 =
- 32.109 − 58 =
- 33.95 − 77 =
- 34.78 − 40 =
- 35.125 − 77 =
- 36.1021 − 992 =
- 37.503 − 480 =
- 38.52 − 45 =
- 39.118 − 95 =
- 40.107 − 82 =
Answer key
- 13
- 18
- 28
- 10
- 32
- 24
- 47
- 32
- 7
- 52
- 24
- 45
- 25
- 34
- 38
- 22
- 21
- 23
- 13
- 15
- 31
- 15
- 19
- 22
- 39
- 23
- 32
- 27
- 12
- 24
- 28
- 51
- 18
- 38
- 48
- 29
- 23
- 7
- 23
- 25
Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths