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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 272 · 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. 1.59 + 28 + 25 + 69 =
  2. 2.34 + 39 + 53 + 17 =
  3. 3.67 + 66 + 49 + 46 =
  4. 4.33 + 28 + 16 + 63 =
  5. 5.24 + 83 + 33 + 29 =
  6. 6.25 + 32 + 83 + 31 =
  7. 7.52 + 60 + 21 + 12 =
  8. 8.65 + 12 + 13 + 79 =
  9. 9.27 + 48 + 45 + 79 =
  10. 10.16 + 75 + 73 + 43 =
  11. 11.69 + 78 + 76 + 77 =
  12. 12.22 + 34 + 64 + 18 =
  13. 13.70 + 80 + 26 + 28 =
  14. 14.28 + 35 + 75 + 20 =
  15. 15.45 + 46 + 73 + 42 =
  16. 16.50 + 56 + 13 + 79 =
  17. 17.35 + 82 + 61 + 29 =
  18. 18.46 + 20 + 51 + 88 =
  19. 19.87 + 40 + 61 + 54 =
  20. 20.79 + 37 + 89 + 32 =
  21. 21.31 + 21 + 87 + 27 =
  22. 22.47 + 78 + 49 + 85 =
  23. 23.82 + 48 + 77 + 89 =
  24. 24.28 + 86 + 65 + 57 =
  25. 25.57 + 58 + 14 + 21 =
  26. 26.30 + 36 + 58 + 77 =
  27. 27.62 + 60 + 62 + 85 =
  28. 28.75 + 54 + 22 + 69 =
  29. 29.65 + 46 + 62 + 71 =
  30. 30.43 + 65 + 17 + 50 =
  31. 31.67 + 35 + 72 + 72 =
  32. 32.55 + 28 + 52 + 19 =
  33. 33.75 + 86 + 47 + 20 =
  34. 34.84 + 41 + 16 + 63 =
  35. 35.69 + 69 + 35 + 38 =
  36. 36.35 + 25 + 35 + 62 =
  37. 37.48 + 46 + 24 + 46 =
  38. 38.39 + 20 + 64 + 45 =
  39. 39.16 + 80 + 17 + 66 =
  40. 40.21 + 27 + 35 + 48 =

Answer key

  1. 181
  2. 143
  3. 228
  4. 140
  5. 169
  6. 171
  7. 145
  8. 169
  9. 199
  10. 207
  11. 300
  12. 138
  13. 204
  14. 158
  15. 206
  16. 198
  17. 207
  18. 205
  19. 242
  20. 237
  21. 166
  22. 259
  23. 296
  24. 236
  25. 150
  26. 201
  27. 269
  28. 220
  29. 244
  30. 175
  31. 246
  32. 154
  33. 228
  34. 204
  35. 211
  36. 157
  37. 164
  38. 168
  39. 179
  40. 131

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