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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 438 · 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. 1.49 + 30 + 65 + 14 =
  2. 2.13 + 46 + 37 + 24 =
  3. 3.28 + 40 + 57 + 64 =
  4. 4.32 + 51 + 21 + 88 =
  5. 5.64 + 37 + 33 + 73 =
  6. 6.50 + 74 + 80 + 50 =
  7. 7.83 + 24 + 17 + 44 =
  8. 8.13 + 51 + 22 + 64 =
  9. 9.20 + 43 + 26 + 20 =
  10. 10.62 + 55 + 48 + 50 =
  11. 11.22 + 43 + 84 + 30 =
  12. 12.17 + 13 + 75 + 34 =
  13. 13.12 + 22 + 39 + 64 =
  14. 14.44 + 49 + 34 + 80 =
  15. 15.68 + 61 + 16 + 55 =
  16. 16.29 + 15 + 81 + 39 =
  17. 17.13 + 55 + 86 + 11 =
  18. 18.40 + 27 + 52 + 44 =
  19. 19.57 + 25 + 88 + 55 =
  20. 20.14 + 46 + 85 + 45 =
  21. 21.21 + 51 + 63 + 28 =
  22. 22.69 + 55 + 56 + 38 =
  23. 23.54 + 86 + 89 + 47 =
  24. 24.45 + 56 + 58 + 17 =
  25. 25.77 + 69 + 63 + 12 =
  26. 26.68 + 25 + 12 + 70 =
  27. 27.26 + 27 + 39 + 35 =
  28. 28.40 + 14 + 15 + 68 =
  29. 29.32 + 39 + 40 + 78 =
  30. 30.72 + 44 + 85 + 84 =
  31. 31.55 + 20 + 30 + 76 =
  32. 32.66 + 41 + 32 + 77 =
  33. 33.20 + 67 + 38 + 43 =
  34. 34.27 + 68 + 57 + 54 =
  35. 35.62 + 35 + 26 + 15 =
  36. 36.77 + 75 + 34 + 79 =
  37. 37.36 + 76 + 49 + 62 =
  38. 38.27 + 63 + 31 + 37 =
  39. 39.25 + 19 + 56 + 27 =
  40. 40.17 + 53 + 50 + 74 =

Answer key

  1. 158
  2. 120
  3. 189
  4. 192
  5. 207
  6. 254
  7. 168
  8. 150
  9. 109
  10. 215
  11. 179
  12. 139
  13. 137
  14. 207
  15. 200
  16. 164
  17. 165
  18. 163
  19. 225
  20. 190
  21. 163
  22. 218
  23. 276
  24. 176
  25. 221
  26. 175
  27. 127
  28. 137
  29. 189
  30. 285
  31. 181
  32. 216
  33. 168
  34. 206
  35. 138
  36. 265
  37. 223
  38. 158
  39. 127
  40. 194

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