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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 444 · 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. 1.51 + 49 + 39 + 80 =
  2. 2.72 + 42 + 84 + 74 =
  3. 3.52 + 42 + 57 + 35 =
  4. 4.16 + 68 + 60 + 16 =
  5. 5.63 + 21 + 35 + 40 =
  6. 6.27 + 79 + 72 + 60 =
  7. 7.19 + 43 + 39 + 36 =
  8. 8.16 + 26 + 34 + 79 =
  9. 9.41 + 53 + 14 + 73 =
  10. 10.20 + 50 + 34 + 81 =
  11. 11.71 + 45 + 31 + 72 =
  12. 12.52 + 11 + 84 + 76 =
  13. 13.46 + 31 + 53 + 15 =
  14. 14.23 + 53 + 46 + 52 =
  15. 15.86 + 25 + 40 + 72 =
  16. 16.39 + 59 + 46 + 42 =
  17. 17.20 + 19 + 20 + 59 =
  18. 18.66 + 36 + 14 + 29 =
  19. 19.45 + 74 + 44 + 52 =
  20. 20.31 + 34 + 13 + 55 =
  21. 21.81 + 20 + 85 + 16 =
  22. 22.50 + 65 + 27 + 24 =
  23. 23.39 + 77 + 79 + 82 =
  24. 24.23 + 25 + 45 + 59 =
  25. 25.84 + 40 + 20 + 17 =
  26. 26.16 + 53 + 27 + 61 =
  27. 27.21 + 16 + 46 + 86 =
  28. 28.36 + 49 + 13 + 51 =
  29. 29.78 + 77 + 88 + 11 =
  30. 30.11 + 49 + 53 + 89 =
  31. 31.38 + 37 + 35 + 34 =
  32. 32.78 + 78 + 19 + 45 =
  33. 33.27 + 62 + 74 + 13 =
  34. 34.23 + 29 + 24 + 79 =
  35. 35.51 + 21 + 88 + 44 =
  36. 36.33 + 39 + 72 + 20 =
  37. 37.48 + 21 + 63 + 11 =
  38. 38.44 + 28 + 12 + 65 =
  39. 39.17 + 33 + 40 + 36 =
  40. 40.21 + 82 + 25 + 65 =

Answer key

  1. 219
  2. 272
  3. 186
  4. 160
  5. 159
  6. 238
  7. 137
  8. 155
  9. 181
  10. 185
  11. 219
  12. 223
  13. 145
  14. 174
  15. 223
  16. 186
  17. 118
  18. 145
  19. 215
  20. 133
  21. 202
  22. 166
  23. 277
  24. 152
  25. 161
  26. 157
  27. 169
  28. 149
  29. 254
  30. 202
  31. 144
  32. 220
  33. 176
  34. 155
  35. 204
  36. 164
  37. 143
  38. 149
  39. 126
  40. 193

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