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
- 1.59 + 74 + 13 + 76 =
- 2.22 + 19 + 11 + 12 =
- 3.43 + 60 + 20 + 27 =
- 4.82 + 76 + 78 + 58 =
- 5.70 + 43 + 52 + 33 =
- 6.15 + 76 + 64 + 65 =
- 7.20 + 36 + 23 + 56 =
- 8.21 + 48 + 30 + 22 =
- 9.34 + 33 + 30 + 43 =
- 10.64 + 53 + 74 + 55 =
- 11.42 + 65 + 13 + 55 =
- 12.25 + 33 + 39 + 58 =
- 13.80 + 36 + 48 + 11 =
- 14.43 + 60 + 23 + 27 =
- 15.32 + 14 + 83 + 70 =
- 16.25 + 51 + 24 + 40 =
- 17.81 + 57 + 16 + 29 =
- 18.74 + 89 + 16 + 59 =
- 19.57 + 69 + 22 + 75 =
- 20.42 + 52 + 79 + 17 =
- 21.44 + 85 + 58 + 79 =
- 22.26 + 84 + 41 + 30 =
- 23.72 + 11 + 58 + 54 =
- 24.57 + 17 + 50 + 32 =
- 25.13 + 60 + 18 + 57 =
- 26.53 + 11 + 53 + 42 =
- 27.30 + 54 + 47 + 54 =
- 28.13 + 50 + 55 + 40 =
- 29.74 + 36 + 85 + 86 =
- 30.30 + 26 + 24 + 26 =
- 31.19 + 52 + 21 + 25 =
- 32.89 + 86 + 47 + 29 =
- 33.27 + 19 + 30 + 36 =
- 34.56 + 67 + 28 + 69 =
- 35.28 + 55 + 34 + 54 =
- 36.25 + 33 + 79 + 63 =
- 37.33 + 62 + 38 + 86 =
- 38.28 + 83 + 38 + 57 =
- 39.21 + 79 + 26 + 55 =
- 40.31 + 72 + 15 + 62 =
Answer key
- 222
- 64
- 150
- 294
- 198
- 220
- 135
- 121
- 140
- 246
- 175
- 155
- 175
- 153
- 199
- 140
- 183
- 238
- 223
- 190
- 266
- 181
- 195
- 156
- 148
- 159
- 185
- 158
- 281
- 106
- 117
- 251
- 112
- 220
- 171
- 200
- 219
- 206
- 181
- 180
Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths