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
- 1.76 + 85 + 58 + 70 =
- 2.76 + 63 + 65 + 65 =
- 3.24 + 75 + 73 + 18 =
- 4.76 + 18 + 28 + 29 =
- 5.84 + 30 + 12 + 64 =
- 6.15 + 89 + 48 + 12 =
- 7.44 + 27 + 19 + 57 =
- 8.35 + 33 + 21 + 55 =
- 9.30 + 64 + 44 + 38 =
- 10.48 + 14 + 55 + 39 =
- 11.60 + 28 + 72 + 38 =
- 12.13 + 46 + 18 + 32 =
- 13.25 + 49 + 31 + 83 =
- 14.82 + 61 + 19 + 26 =
- 15.87 + 49 + 46 + 68 =
- 16.70 + 18 + 77 + 20 =
- 17.66 + 11 + 78 + 37 =
- 18.24 + 13 + 73 + 21 =
- 19.46 + 59 + 33 + 75 =
- 20.47 + 59 + 33 + 77 =
- 21.74 + 21 + 70 + 19 =
- 22.12 + 29 + 41 + 46 =
- 23.79 + 68 + 58 + 27 =
- 24.42 + 31 + 43 + 36 =
- 25.72 + 74 + 47 + 40 =
- 26.75 + 30 + 31 + 24 =
- 27.76 + 30 + 79 + 71 =
- 28.39 + 70 + 70 + 84 =
- 29.42 + 16 + 37 + 86 =
- 30.43 + 39 + 26 + 19 =
- 31.24 + 23 + 35 + 81 =
- 32.44 + 53 + 56 + 63 =
- 33.17 + 37 + 63 + 13 =
- 34.87 + 17 + 29 + 72 =
- 35.64 + 46 + 26 + 66 =
- 36.23 + 22 + 83 + 19 =
- 37.68 + 88 + 28 + 31 =
- 38.14 + 88 + 45 + 15 =
- 39.19 + 62 + 30 + 79 =
- 40.81 + 30 + 42 + 22 =
Answer key
- 289
- 269
- 190
- 151
- 190
- 164
- 147
- 144
- 176
- 156
- 198
- 109
- 188
- 188
- 250
- 185
- 192
- 131
- 213
- 216
- 184
- 128
- 232
- 152
- 233
- 160
- 256
- 263
- 181
- 127
- 163
- 216
- 130
- 205
- 202
- 147
- 215
- 162
- 190
- 175
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths