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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 630 · 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. 1.18 + 26 + 63 + 70 =
  2. 2.16 + 68 + 73 + 29 =
  3. 3.63 + 41 + 45 + 51 =
  4. 4.31 + 31 + 68 + 76 =
  5. 5.84 + 62 + 60 + 33 =
  6. 6.74 + 74 + 48 + 84 =
  7. 7.33 + 28 + 77 + 79 =
  8. 8.85 + 11 + 28 + 42 =
  9. 9.52 + 67 + 80 + 81 =
  10. 10.11 + 20 + 28 + 63 =
  11. 11.37 + 38 + 65 + 25 =
  12. 12.59 + 25 + 15 + 57 =
  13. 13.43 + 22 + 40 + 33 =
  14. 14.70 + 61 + 49 + 26 =
  15. 15.13 + 58 + 26 + 12 =
  16. 16.89 + 80 + 19 + 31 =
  17. 17.13 + 18 + 14 + 83 =
  18. 18.16 + 69 + 74 + 21 =
  19. 19.49 + 32 + 31 + 54 =
  20. 20.39 + 23 + 52 + 45 =
  21. 21.71 + 45 + 70 + 58 =
  22. 22.74 + 12 + 73 + 87 =
  23. 23.88 + 15 + 57 + 71 =
  24. 24.79 + 82 + 82 + 41 =
  25. 25.59 + 20 + 47 + 74 =
  26. 26.55 + 79 + 70 + 61 =
  27. 27.88 + 30 + 72 + 54 =
  28. 28.59 + 82 + 20 + 23 =
  29. 29.75 + 25 + 27 + 30 =
  30. 30.27 + 42 + 20 + 70 =
  31. 31.54 + 53 + 42 + 16 =
  32. 32.64 + 49 + 20 + 39 =
  33. 33.42 + 51 + 44 + 36 =
  34. 34.13 + 17 + 13 + 56 =
  35. 35.45 + 39 + 48 + 42 =
  36. 36.32 + 29 + 59 + 14 =
  37. 37.35 + 81 + 65 + 74 =
  38. 38.45 + 20 + 86 + 46 =
  39. 39.53 + 65 + 45 + 56 =
  40. 40.40 + 45 + 24 + 62 =

Answer key

  1. 177
  2. 186
  3. 200
  4. 206
  5. 239
  6. 280
  7. 217
  8. 166
  9. 280
  10. 122
  11. 165
  12. 156
  13. 138
  14. 206
  15. 109
  16. 219
  17. 128
  18. 180
  19. 166
  20. 159
  21. 244
  22. 246
  23. 231
  24. 284
  25. 200
  26. 265
  27. 244
  28. 184
  29. 157
  30. 159
  31. 165
  32. 172
  33. 173
  34. 99
  35. 174
  36. 134
  37. 255
  38. 197
  39. 219
  40. 171

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