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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 186 · 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. 1.22 + 64 + 21 + 32 =
  2. 2.78 + 61 + 21 + 80 =
  3. 3.87 + 33 + 27 + 11 =
  4. 4.72 + 78 + 84 + 58 =
  5. 5.31 + 27 + 88 + 33 =
  6. 6.47 + 61 + 28 + 24 =
  7. 7.73 + 37 + 25 + 86 =
  8. 8.71 + 33 + 35 + 35 =
  9. 9.83 + 27 + 29 + 87 =
  10. 10.79 + 53 + 52 + 20 =
  11. 11.22 + 52 + 47 + 40 =
  12. 12.40 + 84 + 41 + 11 =
  13. 13.31 + 52 + 70 + 76 =
  14. 14.20 + 62 + 45 + 13 =
  15. 15.49 + 71 + 73 + 37 =
  16. 16.89 + 68 + 19 + 71 =
  17. 17.18 + 29 + 36 + 36 =
  18. 18.29 + 71 + 19 + 60 =
  19. 19.16 + 16 + 15 + 88 =
  20. 20.78 + 86 + 65 + 19 =
  21. 21.28 + 15 + 18 + 29 =
  22. 22.20 + 11 + 53 + 86 =
  23. 23.39 + 51 + 68 + 69 =
  24. 24.25 + 26 + 42 + 37 =
  25. 25.38 + 29 + 83 + 68 =
  26. 26.33 + 72 + 55 + 80 =
  27. 27.54 + 27 + 31 + 71 =
  28. 28.61 + 48 + 75 + 26 =
  29. 29.62 + 12 + 59 + 82 =
  30. 30.23 + 85 + 84 + 20 =
  31. 31.65 + 59 + 29 + 66 =
  32. 32.24 + 17 + 31 + 83 =
  33. 33.32 + 63 + 24 + 15 =
  34. 34.38 + 34 + 60 + 63 =
  35. 35.86 + 39 + 67 + 61 =
  36. 36.48 + 85 + 17 + 27 =
  37. 37.63 + 38 + 56 + 84 =
  38. 38.16 + 55 + 23 + 58 =
  39. 39.27 + 54 + 70 + 86 =
  40. 40.12 + 72 + 63 + 73 =

Answer key

  1. 139
  2. 240
  3. 158
  4. 292
  5. 179
  6. 160
  7. 221
  8. 174
  9. 226
  10. 204
  11. 161
  12. 176
  13. 229
  14. 140
  15. 230
  16. 247
  17. 119
  18. 179
  19. 135
  20. 248
  21. 90
  22. 170
  23. 227
  24. 130
  25. 218
  26. 240
  27. 183
  28. 210
  29. 215
  30. 212
  31. 219
  32. 155
  33. 134
  34. 195
  35. 253
  36. 177
  37. 241
  38. 152
  39. 237
  40. 220

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