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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 27 · 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. 1.55 + 69 + 27 + 33 =
  2. 2.68 + 12 + 13 + 28 =
  3. 3.31 + 39 + 15 + 14 =
  4. 4.24 + 78 + 78 + 31 =
  5. 5.43 + 59 + 34 + 28 =
  6. 6.55 + 35 + 15 + 22 =
  7. 7.68 + 81 + 50 + 28 =
  8. 8.49 + 31 + 64 + 51 =
  9. 9.85 + 49 + 78 + 52 =
  10. 10.81 + 28 + 43 + 72 =
  11. 11.37 + 36 + 62 + 12 =
  12. 12.36 + 13 + 60 + 89 =
  13. 13.55 + 62 + 13 + 49 =
  14. 14.32 + 25 + 62 + 75 =
  15. 15.25 + 72 + 42 + 39 =
  16. 16.12 + 48 + 38 + 27 =
  17. 17.72 + 42 + 80 + 57 =
  18. 18.35 + 12 + 28 + 18 =
  19. 19.50 + 20 + 18 + 19 =
  20. 20.33 + 75 + 72 + 37 =
  21. 21.32 + 32 + 23 + 62 =
  22. 22.28 + 87 + 13 + 56 =
  23. 23.80 + 81 + 55 + 59 =
  24. 24.50 + 79 + 86 + 30 =
  25. 25.20 + 44 + 11 + 46 =
  26. 26.78 + 51 + 50 + 35 =
  27. 27.17 + 89 + 86 + 35 =
  28. 28.45 + 87 + 12 + 72 =
  29. 29.13 + 36 + 53 + 67 =
  30. 30.75 + 27 + 61 + 40 =
  31. 31.70 + 83 + 26 + 31 =
  32. 32.25 + 54 + 60 + 54 =
  33. 33.78 + 41 + 62 + 70 =
  34. 34.76 + 51 + 51 + 38 =
  35. 35.50 + 57 + 76 + 29 =
  36. 36.58 + 55 + 82 + 72 =
  37. 37.29 + 22 + 19 + 68 =
  38. 38.60 + 25 + 28 + 39 =
  39. 39.83 + 36 + 27 + 63 =
  40. 40.11 + 81 + 26 + 18 =

Answer key

  1. 184
  2. 121
  3. 99
  4. 211
  5. 164
  6. 127
  7. 227
  8. 195
  9. 264
  10. 224
  11. 147
  12. 198
  13. 179
  14. 194
  15. 178
  16. 125
  17. 251
  18. 93
  19. 107
  20. 217
  21. 149
  22. 184
  23. 275
  24. 245
  25. 121
  26. 214
  27. 227
  28. 216
  29. 169
  30. 203
  31. 210
  32. 193
  33. 251
  34. 216
  35. 212
  36. 267
  37. 138
  38. 152
  39. 209
  40. 136

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