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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 688 · 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. 1.79 + 20 + 30 + 30 =
  2. 2.56 + 31 + 72 + 53 =
  3. 3.11 + 49 + 30 + 56 =
  4. 4.84 + 38 + 28 + 41 =
  5. 5.57 + 27 + 55 + 70 =
  6. 6.11 + 23 + 29 + 62 =
  7. 7.25 + 19 + 27 + 56 =
  8. 8.21 + 45 + 39 + 15 =
  9. 9.18 + 43 + 71 + 30 =
  10. 10.75 + 89 + 56 + 54 =
  11. 11.82 + 89 + 86 + 33 =
  12. 12.66 + 28 + 14 + 29 =
  13. 13.13 + 88 + 38 + 28 =
  14. 14.58 + 43 + 16 + 33 =
  15. 15.29 + 72 + 78 + 89 =
  16. 16.39 + 88 + 24 + 22 =
  17. 17.11 + 80 + 21 + 79 =
  18. 18.69 + 61 + 18 + 61 =
  19. 19.51 + 30 + 69 + 73 =
  20. 20.18 + 74 + 20 + 32 =
  21. 21.56 + 40 + 57 + 72 =
  22. 22.41 + 34 + 15 + 58 =
  23. 23.77 + 45 + 42 + 27 =
  24. 24.44 + 73 + 14 + 19 =
  25. 25.17 + 64 + 14 + 29 =
  26. 26.62 + 21 + 53 + 80 =
  27. 27.32 + 39 + 44 + 65 =
  28. 28.64 + 45 + 32 + 32 =
  29. 29.32 + 35 + 89 + 51 =
  30. 30.12 + 80 + 16 + 86 =
  31. 31.49 + 36 + 89 + 38 =
  32. 32.41 + 82 + 57 + 89 =
  33. 33.23 + 53 + 31 + 62 =
  34. 34.73 + 35 + 85 + 16 =
  35. 35.36 + 46 + 88 + 24 =
  36. 36.25 + 30 + 49 + 30 =
  37. 37.45 + 20 + 64 + 43 =
  38. 38.83 + 13 + 20 + 49 =
  39. 39.37 + 17 + 35 + 81 =
  40. 40.37 + 12 + 82 + 66 =

Answer key

  1. 159
  2. 212
  3. 146
  4. 191
  5. 209
  6. 125
  7. 127
  8. 120
  9. 162
  10. 274
  11. 290
  12. 137
  13. 167
  14. 150
  15. 268
  16. 173
  17. 191
  18. 209
  19. 223
  20. 144
  21. 225
  22. 148
  23. 191
  24. 150
  25. 124
  26. 216
  27. 180
  28. 173
  29. 207
  30. 194
  31. 212
  32. 269
  33. 169
  34. 209
  35. 194
  36. 134
  37. 172
  38. 165
  39. 170
  40. 197

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