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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 338 · 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. 1.28 + 49 + 25 + 48 =
  2. 2.15 + 37 + 33 + 45 =
  3. 3.17 + 19 + 34 + 26 =
  4. 4.17 + 43 + 21 + 19 =
  5. 5.72 + 49 + 20 + 28 =
  6. 6.13 + 31 + 80 + 42 =
  7. 7.57 + 55 + 87 + 23 =
  8. 8.19 + 76 + 23 + 37 =
  9. 9.56 + 77 + 52 + 30 =
  10. 10.29 + 16 + 18 + 39 =
  11. 11.41 + 70 + 78 + 32 =
  12. 12.14 + 61 + 35 + 61 =
  13. 13.22 + 16 + 85 + 70 =
  14. 14.57 + 45 + 14 + 75 =
  15. 15.40 + 68 + 26 + 55 =
  16. 16.27 + 45 + 33 + 47 =
  17. 17.21 + 29 + 36 + 63 =
  18. 18.46 + 63 + 21 + 88 =
  19. 19.14 + 39 + 48 + 25 =
  20. 20.16 + 22 + 81 + 71 =
  21. 21.50 + 61 + 28 + 19 =
  22. 22.41 + 34 + 68 + 77 =
  23. 23.51 + 20 + 38 + 62 =
  24. 24.30 + 16 + 19 + 42 =
  25. 25.25 + 38 + 29 + 29 =
  26. 26.41 + 18 + 78 + 75 =
  27. 27.52 + 81 + 31 + 17 =
  28. 28.32 + 33 + 68 + 79 =
  29. 29.84 + 25 + 54 + 29 =
  30. 30.23 + 54 + 32 + 48 =
  31. 31.12 + 51 + 23 + 24 =
  32. 32.31 + 60 + 84 + 85 =
  33. 33.76 + 84 + 71 + 75 =
  34. 34.53 + 33 + 63 + 18 =
  35. 35.62 + 56 + 42 + 81 =
  36. 36.84 + 17 + 48 + 84 =
  37. 37.30 + 51 + 82 + 66 =
  38. 38.24 + 87 + 27 + 21 =
  39. 39.40 + 61 + 53 + 68 =
  40. 40.77 + 76 + 53 + 55 =

Answer key

  1. 150
  2. 130
  3. 96
  4. 100
  5. 169
  6. 166
  7. 222
  8. 155
  9. 215
  10. 102
  11. 221
  12. 171
  13. 193
  14. 191
  15. 189
  16. 152
  17. 149
  18. 218
  19. 126
  20. 190
  21. 158
  22. 220
  23. 171
  24. 107
  25. 121
  26. 212
  27. 181
  28. 212
  29. 192
  30. 157
  31. 110
  32. 260
  33. 306
  34. 167
  35. 241
  36. 233
  37. 229
  38. 159
  39. 222
  40. 261

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