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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 546 · 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. 1.75 + 11 + 72 + 64 =
  2. 2.47 + 28 + 12 + 64 =
  3. 3.13 + 64 + 48 + 51 =
  4. 4.45 + 37 + 50 + 31 =
  5. 5.76 + 43 + 46 + 88 =
  6. 6.24 + 20 + 70 + 87 =
  7. 7.28 + 38 + 32 + 12 =
  8. 8.66 + 15 + 25 + 89 =
  9. 9.19 + 65 + 59 + 21 =
  10. 10.30 + 32 + 46 + 52 =
  11. 11.73 + 58 + 58 + 47 =
  12. 12.59 + 25 + 17 + 21 =
  13. 13.32 + 24 + 47 + 11 =
  14. 14.69 + 33 + 19 + 62 =
  15. 15.39 + 46 + 15 + 19 =
  16. 16.81 + 52 + 21 + 45 =
  17. 17.35 + 21 + 38 + 17 =
  18. 18.60 + 47 + 15 + 86 =
  19. 19.58 + 36 + 68 + 28 =
  20. 20.21 + 20 + 57 + 50 =
  21. 21.58 + 15 + 63 + 23 =
  22. 22.42 + 18 + 84 + 65 =
  23. 23.49 + 87 + 66 + 72 =
  24. 24.25 + 69 + 73 + 37 =
  25. 25.85 + 49 + 85 + 65 =
  26. 26.13 + 46 + 20 + 36 =
  27. 27.78 + 20 + 62 + 48 =
  28. 28.46 + 13 + 83 + 84 =
  29. 29.13 + 34 + 20 + 15 =
  30. 30.69 + 71 + 17 + 62 =
  31. 31.12 + 31 + 20 + 74 =
  32. 32.46 + 72 + 49 + 24 =
  33. 33.78 + 56 + 11 + 42 =
  34. 34.51 + 22 + 12 + 49 =
  35. 35.75 + 45 + 46 + 21 =
  36. 36.44 + 56 + 56 + 28 =
  37. 37.23 + 20 + 42 + 82 =
  38. 38.79 + 26 + 68 + 47 =
  39. 39.86 + 12 + 21 + 47 =
  40. 40.16 + 39 + 48 + 40 =

Answer key

  1. 222
  2. 151
  3. 176
  4. 163
  5. 253
  6. 201
  7. 110
  8. 195
  9. 164
  10. 160
  11. 236
  12. 122
  13. 114
  14. 183
  15. 119
  16. 199
  17. 111
  18. 208
  19. 190
  20. 148
  21. 159
  22. 209
  23. 274
  24. 204
  25. 284
  26. 115
  27. 208
  28. 226
  29. 82
  30. 219
  31. 137
  32. 191
  33. 187
  34. 134
  35. 187
  36. 184
  37. 167
  38. 220
  39. 166
  40. 143

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