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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 658 · 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. 1.24 + 44 + 21 + 62 =
  2. 2.53 + 53 + 13 + 88 =
  3. 3.39 + 17 + 13 + 57 =
  4. 4.86 + 54 + 37 + 51 =
  5. 5.79 + 18 + 53 + 55 =
  6. 6.82 + 38 + 52 + 39 =
  7. 7.68 + 33 + 24 + 78 =
  8. 8.78 + 88 + 11 + 15 =
  9. 9.27 + 58 + 30 + 62 =
  10. 10.66 + 47 + 35 + 83 =
  11. 11.13 + 84 + 58 + 70 =
  12. 12.43 + 65 + 89 + 21 =
  13. 13.58 + 79 + 33 + 59 =
  14. 14.56 + 34 + 12 + 58 =
  15. 15.29 + 89 + 68 + 16 =
  16. 16.24 + 29 + 28 + 29 =
  17. 17.63 + 25 + 28 + 47 =
  18. 18.50 + 19 + 65 + 33 =
  19. 19.34 + 12 + 71 + 69 =
  20. 20.22 + 83 + 44 + 19 =
  21. 21.15 + 40 + 76 + 27 =
  22. 22.13 + 17 + 13 + 24 =
  23. 23.15 + 40 + 20 + 23 =
  24. 24.17 + 24 + 53 + 24 =
  25. 25.88 + 12 + 13 + 65 =
  26. 26.61 + 69 + 27 + 29 =
  27. 27.71 + 43 + 38 + 56 =
  28. 28.74 + 19 + 41 + 88 =
  29. 29.56 + 63 + 17 + 32 =
  30. 30.52 + 76 + 61 + 82 =
  31. 31.46 + 42 + 75 + 78 =
  32. 32.24 + 65 + 63 + 71 =
  33. 33.19 + 14 + 45 + 21 =
  34. 34.55 + 48 + 22 + 81 =
  35. 35.88 + 24 + 21 + 21 =
  36. 36.87 + 22 + 25 + 54 =
  37. 37.61 + 62 + 53 + 61 =
  38. 38.23 + 36 + 48 + 37 =
  39. 39.86 + 31 + 68 + 70 =
  40. 40.37 + 82 + 55 + 11 =

Answer key

  1. 151
  2. 207
  3. 126
  4. 228
  5. 205
  6. 211
  7. 203
  8. 192
  9. 177
  10. 231
  11. 225
  12. 218
  13. 229
  14. 160
  15. 202
  16. 110
  17. 163
  18. 167
  19. 186
  20. 168
  21. 158
  22. 67
  23. 98
  24. 118
  25. 178
  26. 186
  27. 208
  28. 222
  29. 168
  30. 271
  31. 241
  32. 223
  33. 99
  34. 206
  35. 154
  36. 188
  37. 237
  38. 144
  39. 255
  40. 185

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