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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 578 · 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. 1.71 + 31 + 84 + 62 =
  2. 2.51 + 18 + 13 + 32 =
  3. 3.39 + 57 + 20 + 14 =
  4. 4.23 + 30 + 58 + 53 =
  5. 5.23 + 35 + 19 + 68 =
  6. 6.29 + 18 + 41 + 31 =
  7. 7.45 + 58 + 85 + 18 =
  8. 8.11 + 57 + 28 + 31 =
  9. 9.53 + 49 + 25 + 18 =
  10. 10.53 + 68 + 43 + 88 =
  11. 11.15 + 31 + 35 + 80 =
  12. 12.62 + 25 + 17 + 12 =
  13. 13.79 + 15 + 47 + 69 =
  14. 14.20 + 70 + 43 + 31 =
  15. 15.48 + 18 + 11 + 13 =
  16. 16.52 + 17 + 34 + 16 =
  17. 17.77 + 52 + 80 + 14 =
  18. 18.60 + 71 + 15 + 20 =
  19. 19.55 + 73 + 73 + 36 =
  20. 20.30 + 33 + 85 + 41 =
  21. 21.25 + 71 + 49 + 50 =
  22. 22.68 + 49 + 49 + 46 =
  23. 23.81 + 65 + 49 + 78 =
  24. 24.89 + 55 + 69 + 23 =
  25. 25.15 + 17 + 28 + 14 =
  26. 26.12 + 17 + 37 + 31 =
  27. 27.21 + 39 + 72 + 84 =
  28. 28.89 + 32 + 63 + 80 =
  29. 29.22 + 86 + 30 + 43 =
  30. 30.44 + 12 + 26 + 18 =
  31. 31.31 + 56 + 73 + 63 =
  32. 32.83 + 20 + 54 + 82 =
  33. 33.53 + 30 + 74 + 65 =
  34. 34.18 + 16 + 67 + 82 =
  35. 35.33 + 28 + 51 + 32 =
  36. 36.87 + 45 + 16 + 13 =
  37. 37.14 + 84 + 50 + 84 =
  38. 38.77 + 16 + 31 + 66 =
  39. 39.39 + 70 + 35 + 83 =
  40. 40.82 + 15 + 15 + 73 =

Answer key

  1. 248
  2. 114
  3. 130
  4. 164
  5. 145
  6. 119
  7. 206
  8. 127
  9. 145
  10. 252
  11. 161
  12. 116
  13. 210
  14. 164
  15. 90
  16. 119
  17. 223
  18. 166
  19. 237
  20. 189
  21. 195
  22. 212
  23. 273
  24. 236
  25. 74
  26. 97
  27. 216
  28. 264
  29. 181
  30. 100
  31. 223
  32. 239
  33. 222
  34. 183
  35. 144
  36. 161
  37. 232
  38. 190
  39. 227
  40. 185

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