Mental Addition Worksheet
The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.
NameDateTime takenScore ___ / 40
- 1.62 + 74 + 45 + 37 =
- 2.30 + 80 + 31 + 60 =
- 3.32 + 46 + 86 + 17 =
- 4.15 + 30 + 62 + 20 =
- 5.76 + 45 + 49 + 33 =
- 6.11 + 11 + 38 + 11 =
- 7.38 + 74 + 61 + 34 =
- 8.70 + 88 + 25 + 53 =
- 9.36 + 85 + 56 + 15 =
- 10.55 + 42 + 11 + 67 =
- 11.13 + 73 + 25 + 60 =
- 12.26 + 24 + 68 + 43 =
- 13.11 + 57 + 64 + 25 =
- 14.37 + 71 + 65 + 29 =
- 15.56 + 36 + 14 + 17 =
- 16.16 + 64 + 42 + 77 =
- 17.84 + 28 + 32 + 12 =
- 18.55 + 71 + 86 + 18 =
- 19.89 + 14 + 63 + 89 =
- 20.52 + 14 + 63 + 29 =
- 21.55 + 20 + 51 + 71 =
- 22.69 + 47 + 22 + 36 =
- 23.18 + 74 + 24 + 64 =
- 24.11 + 29 + 45 + 58 =
- 25.13 + 22 + 27 + 29 =
- 26.68 + 47 + 82 + 72 =
- 27.39 + 81 + 22 + 30 =
- 28.27 + 16 + 56 + 64 =
- 29.72 + 73 + 64 + 22 =
- 30.18 + 80 + 51 + 28 =
- 31.39 + 77 + 63 + 31 =
- 32.58 + 71 + 52 + 42 =
- 33.38 + 56 + 64 + 50 =
- 34.56 + 31 + 22 + 53 =
- 35.70 + 29 + 37 + 69 =
- 36.42 + 24 + 81 + 70 =
- 37.18 + 12 + 62 + 62 =
- 38.43 + 12 + 33 + 15 =
- 39.48 + 47 + 45 + 33 =
- 40.52 + 84 + 15 + 27 =
Answer key
- 218
- 201
- 181
- 127
- 203
- 71
- 207
- 236
- 192
- 175
- 171
- 161
- 157
- 202
- 123
- 199
- 156
- 230
- 255
- 158
- 197
- 174
- 180
- 143
- 91
- 269
- 172
- 163
- 231
- 177
- 210
- 223
- 208
- 162
- 205
- 217
- 154
- 103
- 173
- 178
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths