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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 589 · 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. 1.35 + 70 + 67 + 61 =
  2. 2.44 + 43 + 85 + 34 =
  3. 3.43 + 50 + 33 + 49 =
  4. 4.12 + 43 + 18 + 64 =
  5. 5.20 + 44 + 79 + 37 =
  6. 6.82 + 69 + 56 + 88 =
  7. 7.21 + 69 + 18 + 66 =
  8. 8.67 + 34 + 81 + 30 =
  9. 9.74 + 33 + 83 + 38 =
  10. 10.57 + 31 + 48 + 12 =
  11. 11.61 + 89 + 39 + 18 =
  12. 12.42 + 71 + 73 + 50 =
  13. 13.74 + 62 + 58 + 58 =
  14. 14.70 + 68 + 63 + 24 =
  15. 15.85 + 79 + 37 + 35 =
  16. 16.63 + 82 + 63 + 48 =
  17. 17.84 + 20 + 19 + 85 =
  18. 18.23 + 34 + 43 + 81 =
  19. 19.48 + 12 + 24 + 84 =
  20. 20.71 + 71 + 12 + 36 =
  21. 21.89 + 26 + 11 + 71 =
  22. 22.73 + 28 + 86 + 89 =
  23. 23.39 + 52 + 18 + 15 =
  24. 24.27 + 26 + 14 + 77 =
  25. 25.19 + 78 + 43 + 69 =
  26. 26.68 + 65 + 86 + 25 =
  27. 27.36 + 81 + 45 + 49 =
  28. 28.30 + 33 + 64 + 46 =
  29. 29.16 + 52 + 81 + 25 =
  30. 30.78 + 60 + 20 + 30 =
  31. 31.35 + 22 + 17 + 70 =
  32. 32.48 + 77 + 77 + 12 =
  33. 33.36 + 85 + 14 + 79 =
  34. 34.87 + 43 + 61 + 25 =
  35. 35.30 + 82 + 71 + 66 =
  36. 36.55 + 64 + 46 + 77 =
  37. 37.43 + 75 + 36 + 42 =
  38. 38.40 + 59 + 47 + 72 =
  39. 39.58 + 53 + 73 + 35 =
  40. 40.31 + 12 + 28 + 89 =

Answer key

  1. 233
  2. 206
  3. 175
  4. 137
  5. 180
  6. 295
  7. 174
  8. 212
  9. 228
  10. 148
  11. 207
  12. 236
  13. 252
  14. 225
  15. 236
  16. 256
  17. 208
  18. 181
  19. 168
  20. 190
  21. 197
  22. 276
  23. 124
  24. 144
  25. 209
  26. 244
  27. 211
  28. 173
  29. 174
  30. 188
  31. 144
  32. 214
  33. 214
  34. 216
  35. 249
  36. 242
  37. 196
  38. 218
  39. 219
  40. 160

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