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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 453 · 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. 1.69 + 29 + 20 + 52 =
  2. 2.55 + 51 + 80 + 88 =
  3. 3.42 + 25 + 17 + 88 =
  4. 4.74 + 78 + 55 + 75 =
  5. 5.60 + 81 + 51 + 88 =
  6. 6.23 + 45 + 24 + 27 =
  7. 7.40 + 56 + 12 + 83 =
  8. 8.59 + 65 + 73 + 13 =
  9. 9.32 + 89 + 22 + 59 =
  10. 10.28 + 70 + 20 + 55 =
  11. 11.27 + 30 + 72 + 19 =
  12. 12.60 + 39 + 24 + 83 =
  13. 13.75 + 23 + 74 + 60 =
  14. 14.13 + 89 + 18 + 26 =
  15. 15.80 + 12 + 79 + 75 =
  16. 16.59 + 15 + 35 + 83 =
  17. 17.53 + 33 + 42 + 31 =
  18. 18.34 + 11 + 16 + 65 =
  19. 19.46 + 31 + 25 + 26 =
  20. 20.51 + 26 + 46 + 44 =
  21. 21.13 + 40 + 34 + 68 =
  22. 22.84 + 17 + 31 + 24 =
  23. 23.42 + 14 + 40 + 49 =
  24. 24.64 + 44 + 13 + 61 =
  25. 25.13 + 31 + 38 + 11 =
  26. 26.49 + 33 + 71 + 42 =
  27. 27.37 + 28 + 53 + 17 =
  28. 28.11 + 71 + 68 + 76 =
  29. 29.25 + 24 + 21 + 75 =
  30. 30.68 + 55 + 37 + 25 =
  31. 31.15 + 31 + 70 + 25 =
  32. 32.53 + 77 + 41 + 50 =
  33. 33.80 + 84 + 16 + 28 =
  34. 34.68 + 18 + 73 + 26 =
  35. 35.13 + 59 + 45 + 35 =
  36. 36.29 + 59 + 23 + 42 =
  37. 37.37 + 39 + 81 + 33 =
  38. 38.53 + 36 + 59 + 69 =
  39. 39.13 + 12 + 28 + 21 =
  40. 40.33 + 35 + 15 + 78 =

Answer key

  1. 170
  2. 274
  3. 172
  4. 282
  5. 280
  6. 119
  7. 191
  8. 210
  9. 202
  10. 173
  11. 148
  12. 206
  13. 232
  14. 146
  15. 246
  16. 192
  17. 159
  18. 126
  19. 128
  20. 167
  21. 155
  22. 156
  23. 145
  24. 182
  25. 93
  26. 195
  27. 135
  28. 226
  29. 145
  30. 185
  31. 141
  32. 221
  33. 208
  34. 185
  35. 152
  36. 153
  37. 190
  38. 217
  39. 74
  40. 161

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