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
- 1.17 + 23 + 84 + 61 =
- 2.64 + 73 + 49 + 14 =
- 3.29 + 71 + 30 + 62 =
- 4.45 + 42 + 50 + 34 =
- 5.19 + 82 + 13 + 66 =
- 6.55 + 24 + 11 + 35 =
- 7.29 + 31 + 40 + 84 =
- 8.85 + 34 + 56 + 31 =
- 9.78 + 31 + 25 + 84 =
- 10.78 + 44 + 80 + 65 =
- 11.30 + 65 + 27 + 26 =
- 12.62 + 34 + 13 + 57 =
- 13.47 + 31 + 41 + 83 =
- 14.55 + 32 + 81 + 29 =
- 15.51 + 44 + 53 + 83 =
- 16.51 + 65 + 12 + 20 =
- 17.22 + 82 + 79 + 13 =
- 18.58 + 77 + 20 + 21 =
- 19.69 + 57 + 43 + 27 =
- 20.47 + 24 + 27 + 77 =
- 21.53 + 77 + 32 + 50 =
- 22.79 + 46 + 12 + 75 =
- 23.49 + 67 + 13 + 49 =
- 24.46 + 70 + 19 + 75 =
- 25.89 + 56 + 48 + 29 =
- 26.38 + 29 + 27 + 40 =
- 27.70 + 12 + 34 + 42 =
- 28.22 + 47 + 51 + 77 =
- 29.87 + 27 + 51 + 16 =
- 30.73 + 15 + 41 + 60 =
- 31.16 + 25 + 32 + 71 =
- 32.66 + 48 + 78 + 35 =
- 33.47 + 81 + 44 + 45 =
- 34.31 + 55 + 67 + 39 =
- 35.19 + 36 + 54 + 16 =
- 36.58 + 70 + 16 + 28 =
- 37.40 + 35 + 62 + 58 =
- 38.12 + 55 + 26 + 34 =
- 39.89 + 37 + 15 + 56 =
- 40.28 + 28 + 11 + 29 =
Answer key
- 185
- 200
- 192
- 171
- 180
- 125
- 184
- 206
- 218
- 267
- 148
- 166
- 202
- 197
- 231
- 148
- 196
- 176
- 196
- 175
- 212
- 212
- 178
- 210
- 222
- 134
- 158
- 197
- 181
- 189
- 144
- 227
- 217
- 192
- 125
- 172
- 195
- 127
- 197
- 96
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths