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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 767 · 40 questions
TalentJR

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. 1.72 + 88 + 23 + 20 =
  2. 2.38 + 33 + 40 + 33 =
  3. 3.62 + 54 + 30 + 64 =
  4. 4.66 + 84 + 85 + 55 =
  5. 5.24 + 23 + 63 + 64 =
  6. 6.30 + 80 + 64 + 34 =
  7. 7.82 + 26 + 35 + 40 =
  8. 8.39 + 85 + 44 + 27 =
  9. 9.12 + 68 + 23 + 53 =
  10. 10.16 + 29 + 82 + 60 =
  11. 11.11 + 50 + 57 + 42 =
  12. 12.12 + 36 + 18 + 82 =
  13. 13.18 + 41 + 73 + 50 =
  14. 14.56 + 41 + 75 + 18 =
  15. 15.53 + 79 + 23 + 52 =
  16. 16.30 + 39 + 49 + 58 =
  17. 17.44 + 11 + 88 + 84 =
  18. 18.83 + 19 + 27 + 32 =
  19. 19.47 + 31 + 84 + 12 =
  20. 20.22 + 24 + 83 + 50 =
  21. 21.56 + 48 + 12 + 37 =
  22. 22.62 + 78 + 16 + 40 =
  23. 23.52 + 26 + 18 + 66 =
  24. 24.78 + 18 + 69 + 79 =
  25. 25.77 + 52 + 25 + 48 =
  26. 26.88 + 64 + 24 + 85 =
  27. 27.29 + 39 + 16 + 49 =
  28. 28.34 + 70 + 73 + 48 =
  29. 29.29 + 34 + 36 + 80 =
  30. 30.61 + 47 + 49 + 64 =
  31. 31.31 + 87 + 33 + 66 =
  32. 32.62 + 51 + 72 + 26 =
  33. 33.63 + 22 + 30 + 78 =
  34. 34.37 + 80 + 56 + 47 =
  35. 35.19 + 81 + 55 + 89 =
  36. 36.62 + 61 + 85 + 21 =
  37. 37.21 + 53 + 21 + 68 =
  38. 38.77 + 42 + 37 + 29 =
  39. 39.58 + 64 + 36 + 29 =
  40. 40.31 + 42 + 19 + 27 =

Answer key

  1. 203
  2. 144
  3. 210
  4. 290
  5. 174
  6. 208
  7. 183
  8. 195
  9. 156
  10. 187
  11. 160
  12. 148
  13. 182
  14. 190
  15. 207
  16. 176
  17. 227
  18. 161
  19. 174
  20. 179
  21. 153
  22. 196
  23. 162
  24. 244
  25. 202
  26. 261
  27. 133
  28. 225
  29. 179
  30. 221
  31. 217
  32. 211
  33. 193
  34. 220
  35. 244
  36. 229
  37. 163
  38. 185
  39. 187
  40. 119

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