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
- 1.18 + 71 + 26 + 17 =
- 2.61 + 34 + 57 + 63 =
- 3.26 + 36 + 21 + 59 =
- 4.40 + 74 + 42 + 28 =
- 5.83 + 81 + 84 + 12 =
- 6.84 + 42 + 71 + 26 =
- 7.64 + 84 + 82 + 13 =
- 8.71 + 30 + 11 + 29 =
- 9.31 + 12 + 88 + 66 =
- 10.16 + 73 + 88 + 29 =
- 11.82 + 57 + 34 + 39 =
- 12.82 + 73 + 71 + 85 =
- 13.78 + 15 + 18 + 36 =
- 14.24 + 64 + 38 + 81 =
- 15.75 + 83 + 49 + 48 =
- 16.77 + 77 + 80 + 31 =
- 17.12 + 11 + 64 + 70 =
- 18.69 + 17 + 75 + 63 =
- 19.62 + 79 + 37 + 55 =
- 20.28 + 75 + 15 + 54 =
- 21.73 + 61 + 56 + 80 =
- 22.61 + 67 + 52 + 11 =
- 23.77 + 46 + 71 + 58 =
- 24.23 + 19 + 43 + 76 =
- 25.87 + 26 + 50 + 15 =
- 26.57 + 58 + 16 + 26 =
- 27.24 + 26 + 67 + 65 =
- 28.33 + 33 + 31 + 55 =
- 29.27 + 62 + 81 + 73 =
- 30.38 + 21 + 55 + 50 =
- 31.52 + 24 + 60 + 17 =
- 32.36 + 13 + 79 + 39 =
- 33.23 + 53 + 16 + 89 =
- 34.65 + 38 + 31 + 62 =
- 35.88 + 19 + 26 + 13 =
- 36.39 + 26 + 63 + 27 =
- 37.36 + 19 + 56 + 63 =
- 38.15 + 31 + 31 + 25 =
- 39.12 + 80 + 52 + 47 =
- 40.13 + 71 + 69 + 21 =
Answer key
- 132
- 215
- 142
- 184
- 260
- 223
- 243
- 141
- 197
- 206
- 212
- 311
- 147
- 207
- 255
- 265
- 157
- 224
- 233
- 172
- 270
- 191
- 252
- 161
- 178
- 157
- 182
- 152
- 243
- 164
- 153
- 167
- 181
- 196
- 146
- 155
- 174
- 102
- 191
- 174
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths