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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 277 · 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. 1.40 + 14 + 24 + 82 =
  2. 2.23 + 69 + 56 + 74 =
  3. 3.74 + 59 + 71 + 19 =
  4. 4.20 + 29 + 18 + 76 =
  5. 5.75 + 15 + 68 + 13 =
  6. 6.20 + 28 + 31 + 42 =
  7. 7.73 + 28 + 35 + 40 =
  8. 8.71 + 58 + 51 + 45 =
  9. 9.43 + 34 + 48 + 57 =
  10. 10.84 + 20 + 63 + 54 =
  11. 11.77 + 57 + 11 + 72 =
  12. 12.66 + 67 + 29 + 29 =
  13. 13.51 + 29 + 72 + 33 =
  14. 14.61 + 84 + 72 + 76 =
  15. 15.37 + 83 + 50 + 84 =
  16. 16.51 + 47 + 76 + 34 =
  17. 17.85 + 12 + 83 + 35 =
  18. 18.58 + 26 + 30 + 41 =
  19. 19.87 + 89 + 88 + 54 =
  20. 20.84 + 52 + 24 + 76 =
  21. 21.79 + 39 + 76 + 78 =
  22. 22.37 + 81 + 34 + 32 =
  23. 23.57 + 76 + 11 + 72 =
  24. 24.53 + 62 + 66 + 47 =
  25. 25.12 + 87 + 33 + 84 =
  26. 26.24 + 37 + 59 + 79 =
  27. 27.43 + 67 + 42 + 47 =
  28. 28.34 + 34 + 76 + 25 =
  29. 29.43 + 46 + 50 + 32 =
  30. 30.32 + 70 + 28 + 37 =
  31. 31.75 + 79 + 76 + 50 =
  32. 32.85 + 22 + 55 + 49 =
  33. 33.71 + 53 + 23 + 26 =
  34. 34.13 + 20 + 13 + 59 =
  35. 35.87 + 69 + 20 + 80 =
  36. 36.18 + 85 + 50 + 70 =
  37. 37.77 + 32 + 35 + 34 =
  38. 38.68 + 75 + 21 + 31 =
  39. 39.76 + 41 + 57 + 37 =
  40. 40.21 + 70 + 49 + 71 =

Answer key

  1. 160
  2. 222
  3. 223
  4. 143
  5. 171
  6. 121
  7. 176
  8. 225
  9. 182
  10. 221
  11. 217
  12. 191
  13. 185
  14. 293
  15. 254
  16. 208
  17. 215
  18. 155
  19. 318
  20. 236
  21. 272
  22. 184
  23. 216
  24. 228
  25. 216
  26. 199
  27. 199
  28. 169
  29. 171
  30. 167
  31. 280
  32. 211
  33. 173
  34. 105
  35. 256
  36. 223
  37. 178
  38. 195
  39. 211
  40. 211

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