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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 770 · 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. 1.52 + 88 + 81 + 54 =
  2. 2.74 + 29 + 13 + 62 =
  3. 3.40 + 17 + 85 + 27 =
  4. 4.33 + 68 + 88 + 44 =
  5. 5.32 + 83 + 83 + 21 =
  6. 6.40 + 16 + 34 + 22 =
  7. 7.14 + 56 + 38 + 40 =
  8. 8.17 + 57 + 31 + 30 =
  9. 9.87 + 60 + 30 + 64 =
  10. 10.17 + 66 + 40 + 32 =
  11. 11.70 + 85 + 22 + 27 =
  12. 12.46 + 81 + 85 + 60 =
  13. 13.27 + 45 + 83 + 39 =
  14. 14.18 + 19 + 40 + 65 =
  15. 15.26 + 64 + 33 + 20 =
  16. 16.28 + 12 + 54 + 26 =
  17. 17.64 + 13 + 69 + 13 =
  18. 18.61 + 68 + 54 + 15 =
  19. 19.78 + 62 + 31 + 40 =
  20. 20.42 + 57 + 56 + 21 =
  21. 21.50 + 16 + 40 + 44 =
  22. 22.22 + 81 + 22 + 75 =
  23. 23.42 + 49 + 34 + 75 =
  24. 24.71 + 77 + 32 + 70 =
  25. 25.47 + 22 + 45 + 58 =
  26. 26.88 + 13 + 26 + 67 =
  27. 27.56 + 41 + 16 + 14 =
  28. 28.42 + 53 + 25 + 17 =
  29. 29.54 + 13 + 55 + 56 =
  30. 30.77 + 13 + 60 + 72 =
  31. 31.49 + 53 + 77 + 45 =
  32. 32.29 + 58 + 17 + 86 =
  33. 33.55 + 19 + 44 + 79 =
  34. 34.75 + 40 + 19 + 22 =
  35. 35.83 + 43 + 65 + 18 =
  36. 36.19 + 71 + 75 + 84 =
  37. 37.46 + 11 + 73 + 11 =
  38. 38.25 + 32 + 75 + 55 =
  39. 39.25 + 61 + 77 + 13 =
  40. 40.50 + 15 + 54 + 23 =

Answer key

  1. 275
  2. 178
  3. 169
  4. 233
  5. 219
  6. 112
  7. 148
  8. 135
  9. 241
  10. 155
  11. 204
  12. 272
  13. 194
  14. 142
  15. 143
  16. 120
  17. 159
  18. 198
  19. 211
  20. 176
  21. 150
  22. 200
  23. 200
  24. 250
  25. 172
  26. 194
  27. 127
  28. 137
  29. 178
  30. 222
  31. 224
  32. 190
  33. 197
  34. 156
  35. 209
  36. 249
  37. 141
  38. 187
  39. 176
  40. 142

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