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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 616 · 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. 1.42 + 67 + 45 + 48 =
  2. 2.46 + 70 + 39 + 62 =
  3. 3.37 + 70 + 45 + 69 =
  4. 4.71 + 16 + 58 + 68 =
  5. 5.58 + 48 + 16 + 85 =
  6. 6.60 + 75 + 85 + 54 =
  7. 7.32 + 16 + 48 + 25 =
  8. 8.65 + 34 + 45 + 89 =
  9. 9.51 + 24 + 33 + 36 =
  10. 10.30 + 51 + 16 + 13 =
  11. 11.21 + 21 + 51 + 85 =
  12. 12.28 + 81 + 13 + 35 =
  13. 13.82 + 32 + 18 + 25 =
  14. 14.83 + 33 + 58 + 13 =
  15. 15.47 + 70 + 68 + 72 =
  16. 16.66 + 52 + 84 + 61 =
  17. 17.35 + 58 + 26 + 30 =
  18. 18.23 + 18 + 28 + 55 =
  19. 19.86 + 29 + 52 + 39 =
  20. 20.89 + 15 + 23 + 37 =
  21. 21.13 + 76 + 51 + 89 =
  22. 22.45 + 62 + 80 + 70 =
  23. 23.57 + 23 + 29 + 59 =
  24. 24.61 + 55 + 39 + 81 =
  25. 25.46 + 30 + 41 + 27 =
  26. 26.23 + 67 + 33 + 31 =
  27. 27.22 + 24 + 21 + 24 =
  28. 28.89 + 29 + 18 + 76 =
  29. 29.59 + 14 + 24 + 24 =
  30. 30.19 + 44 + 11 + 17 =
  31. 31.28 + 12 + 24 + 34 =
  32. 32.11 + 44 + 69 + 46 =
  33. 33.76 + 83 + 62 + 45 =
  34. 34.76 + 71 + 88 + 44 =
  35. 35.82 + 48 + 63 + 59 =
  36. 36.23 + 25 + 33 + 48 =
  37. 37.75 + 65 + 80 + 57 =
  38. 38.85 + 42 + 65 + 16 =
  39. 39.33 + 56 + 23 + 22 =
  40. 40.23 + 46 + 86 + 15 =

Answer key

  1. 202
  2. 217
  3. 221
  4. 213
  5. 207
  6. 274
  7. 121
  8. 233
  9. 144
  10. 110
  11. 178
  12. 157
  13. 157
  14. 187
  15. 257
  16. 263
  17. 149
  18. 124
  19. 206
  20. 164
  21. 229
  22. 257
  23. 168
  24. 236
  25. 144
  26. 154
  27. 91
  28. 212
  29. 121
  30. 91
  31. 98
  32. 170
  33. 266
  34. 279
  35. 252
  36. 129
  37. 277
  38. 208
  39. 134
  40. 170

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