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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 804 · 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. 1.33 + 21 + 83 + 26 =
  2. 2.83 + 80 + 57 + 24 =
  3. 3.53 + 30 + 36 + 16 =
  4. 4.18 + 76 + 62 + 67 =
  5. 5.46 + 33 + 16 + 88 =
  6. 6.41 + 85 + 30 + 63 =
  7. 7.89 + 36 + 34 + 82 =
  8. 8.85 + 76 + 86 + 32 =
  9. 9.41 + 25 + 66 + 13 =
  10. 10.33 + 66 + 84 + 16 =
  11. 11.65 + 73 + 31 + 71 =
  12. 12.83 + 21 + 35 + 54 =
  13. 13.68 + 84 + 62 + 23 =
  14. 14.51 + 34 + 52 + 82 =
  15. 15.59 + 52 + 56 + 36 =
  16. 16.26 + 71 + 49 + 76 =
  17. 17.74 + 61 + 49 + 32 =
  18. 18.75 + 46 + 50 + 16 =
  19. 19.56 + 66 + 81 + 48 =
  20. 20.78 + 68 + 35 + 78 =
  21. 21.33 + 79 + 70 + 89 =
  22. 22.68 + 55 + 28 + 77 =
  23. 23.84 + 65 + 36 + 60 =
  24. 24.69 + 77 + 62 + 64 =
  25. 25.14 + 44 + 36 + 56 =
  26. 26.87 + 37 + 55 + 16 =
  27. 27.81 + 23 + 18 + 57 =
  28. 28.52 + 17 + 15 + 20 =
  29. 29.16 + 40 + 45 + 79 =
  30. 30.72 + 74 + 22 + 40 =
  31. 31.22 + 31 + 53 + 57 =
  32. 32.79 + 87 + 14 + 73 =
  33. 33.50 + 80 + 22 + 85 =
  34. 34.50 + 60 + 28 + 36 =
  35. 35.51 + 18 + 16 + 84 =
  36. 36.85 + 21 + 13 + 68 =
  37. 37.71 + 16 + 73 + 14 =
  38. 38.55 + 84 + 75 + 50 =
  39. 39.57 + 21 + 47 + 67 =
  40. 40.35 + 84 + 26 + 30 =

Answer key

  1. 163
  2. 244
  3. 135
  4. 223
  5. 183
  6. 219
  7. 241
  8. 279
  9. 145
  10. 199
  11. 240
  12. 193
  13. 237
  14. 219
  15. 203
  16. 222
  17. 216
  18. 187
  19. 251
  20. 259
  21. 271
  22. 228
  23. 245
  24. 272
  25. 150
  26. 195
  27. 179
  28. 104
  29. 180
  30. 208
  31. 163
  32. 253
  33. 237
  34. 174
  35. 169
  36. 187
  37. 174
  38. 264
  39. 192
  40. 175

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