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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 387 · 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. 1.12 + 83 + 17 + 42 =
  2. 2.59 + 80 + 31 + 84 =
  3. 3.26 + 55 + 15 + 84 =
  4. 4.76 + 55 + 33 + 78 =
  5. 5.83 + 74 + 24 + 45 =
  6. 6.48 + 88 + 12 + 11 =
  7. 7.20 + 52 + 80 + 46 =
  8. 8.26 + 68 + 18 + 36 =
  9. 9.12 + 43 + 65 + 75 =
  10. 10.21 + 67 + 24 + 36 =
  11. 11.44 + 61 + 33 + 52 =
  12. 12.53 + 44 + 77 + 33 =
  13. 13.87 + 68 + 67 + 77 =
  14. 14.18 + 61 + 41 + 28 =
  15. 15.23 + 40 + 73 + 73 =
  16. 16.60 + 86 + 26 + 78 =
  17. 17.23 + 22 + 70 + 15 =
  18. 18.66 + 68 + 63 + 12 =
  19. 19.82 + 84 + 28 + 83 =
  20. 20.60 + 65 + 46 + 38 =
  21. 21.71 + 68 + 84 + 17 =
  22. 22.64 + 76 + 71 + 69 =
  23. 23.14 + 40 + 51 + 24 =
  24. 24.41 + 80 + 33 + 12 =
  25. 25.61 + 17 + 65 + 37 =
  26. 26.15 + 35 + 23 + 53 =
  27. 27.11 + 42 + 31 + 23 =
  28. 28.37 + 33 + 74 + 82 =
  29. 29.11 + 42 + 50 + 76 =
  30. 30.56 + 18 + 51 + 51 =
  31. 31.25 + 21 + 22 + 34 =
  32. 32.50 + 52 + 32 + 60 =
  33. 33.46 + 56 + 26 + 15 =
  34. 34.40 + 71 + 28 + 71 =
  35. 35.19 + 81 + 37 + 11 =
  36. 36.78 + 76 + 17 + 70 =
  37. 37.34 + 69 + 52 + 47 =
  38. 38.60 + 75 + 20 + 23 =
  39. 39.23 + 49 + 29 + 86 =
  40. 40.78 + 37 + 23 + 23 =

Answer key

  1. 154
  2. 254
  3. 180
  4. 242
  5. 226
  6. 159
  7. 198
  8. 148
  9. 195
  10. 148
  11. 190
  12. 207
  13. 299
  14. 148
  15. 209
  16. 250
  17. 130
  18. 209
  19. 277
  20. 209
  21. 240
  22. 280
  23. 129
  24. 166
  25. 180
  26. 126
  27. 107
  28. 226
  29. 179
  30. 176
  31. 102
  32. 194
  33. 143
  34. 210
  35. 148
  36. 241
  37. 202
  38. 178
  39. 187
  40. 161

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