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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 369 · 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. 1.85 + 34 + 67 + 75 =
  2. 2.49 + 79 + 72 + 31 =
  3. 3.51 + 74 + 17 + 27 =
  4. 4.70 + 55 + 81 + 84 =
  5. 5.46 + 19 + 73 + 12 =
  6. 6.24 + 58 + 13 + 12 =
  7. 7.34 + 14 + 17 + 74 =
  8. 8.26 + 76 + 17 + 81 =
  9. 9.62 + 22 + 36 + 43 =
  10. 10.69 + 24 + 53 + 24 =
  11. 11.24 + 11 + 16 + 68 =
  12. 12.27 + 75 + 65 + 26 =
  13. 13.62 + 85 + 54 + 80 =
  14. 14.46 + 29 + 89 + 62 =
  15. 15.51 + 87 + 72 + 64 =
  16. 16.41 + 14 + 29 + 21 =
  17. 17.19 + 44 + 24 + 65 =
  18. 18.47 + 14 + 88 + 47 =
  19. 19.88 + 38 + 59 + 64 =
  20. 20.11 + 44 + 64 + 11 =
  21. 21.18 + 15 + 51 + 83 =
  22. 22.15 + 76 + 13 + 69 =
  23. 23.35 + 60 + 46 + 13 =
  24. 24.19 + 14 + 87 + 32 =
  25. 25.89 + 37 + 12 + 30 =
  26. 26.46 + 16 + 27 + 80 =
  27. 27.76 + 88 + 14 + 86 =
  28. 28.16 + 66 + 22 + 21 =
  29. 29.35 + 75 + 28 + 68 =
  30. 30.15 + 57 + 70 + 54 =
  31. 31.60 + 61 + 87 + 49 =
  32. 32.65 + 33 + 20 + 87 =
  33. 33.12 + 34 + 26 + 12 =
  34. 34.73 + 51 + 57 + 29 =
  35. 35.82 + 39 + 69 + 16 =
  36. 36.33 + 55 + 13 + 64 =
  37. 37.84 + 86 + 69 + 74 =
  38. 38.84 + 34 + 26 + 72 =
  39. 39.30 + 17 + 71 + 62 =
  40. 40.49 + 62 + 52 + 33 =

Answer key

  1. 261
  2. 231
  3. 169
  4. 290
  5. 150
  6. 107
  7. 139
  8. 200
  9. 163
  10. 170
  11. 119
  12. 193
  13. 281
  14. 226
  15. 274
  16. 105
  17. 152
  18. 196
  19. 249
  20. 130
  21. 167
  22. 173
  23. 154
  24. 152
  25. 168
  26. 169
  27. 264
  28. 125
  29. 206
  30. 196
  31. 257
  32. 205
  33. 84
  34. 210
  35. 206
  36. 165
  37. 313
  38. 216
  39. 180
  40. 196

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