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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 502 · 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. 1.80 + 35 + 22 + 12 =
  2. 2.25 + 68 + 87 + 50 =
  3. 3.69 + 44 + 38 + 49 =
  4. 4.82 + 22 + 79 + 54 =
  5. 5.27 + 69 + 25 + 14 =
  6. 6.86 + 22 + 20 + 87 =
  7. 7.35 + 42 + 16 + 21 =
  8. 8.38 + 17 + 24 + 53 =
  9. 9.52 + 17 + 27 + 11 =
  10. 10.15 + 43 + 23 + 81 =
  11. 11.18 + 65 + 20 + 71 =
  12. 12.63 + 38 + 34 + 14 =
  13. 13.21 + 87 + 72 + 63 =
  14. 14.44 + 53 + 55 + 55 =
  15. 15.45 + 67 + 42 + 33 =
  16. 16.79 + 26 + 58 + 46 =
  17. 17.57 + 52 + 41 + 20 =
  18. 18.51 + 66 + 17 + 34 =
  19. 19.43 + 60 + 19 + 46 =
  20. 20.66 + 52 + 36 + 89 =
  21. 21.74 + 34 + 46 + 69 =
  22. 22.82 + 59 + 11 + 24 =
  23. 23.81 + 11 + 45 + 54 =
  24. 24.12 + 12 + 72 + 36 =
  25. 25.65 + 59 + 39 + 44 =
  26. 26.50 + 66 + 45 + 24 =
  27. 27.80 + 84 + 11 + 46 =
  28. 28.40 + 25 + 73 + 36 =
  29. 29.73 + 57 + 60 + 89 =
  30. 30.11 + 84 + 60 + 84 =
  31. 31.14 + 56 + 35 + 85 =
  32. 32.41 + 36 + 74 + 68 =
  33. 33.78 + 80 + 75 + 32 =
  34. 34.89 + 80 + 48 + 62 =
  35. 35.29 + 18 + 80 + 80 =
  36. 36.40 + 76 + 64 + 85 =
  37. 37.58 + 35 + 51 + 66 =
  38. 38.75 + 32 + 57 + 50 =
  39. 39.15 + 86 + 12 + 51 =
  40. 40.58 + 18 + 24 + 64 =

Answer key

  1. 149
  2. 230
  3. 200
  4. 237
  5. 135
  6. 215
  7. 114
  8. 132
  9. 107
  10. 162
  11. 174
  12. 149
  13. 243
  14. 207
  15. 187
  16. 209
  17. 170
  18. 168
  19. 168
  20. 243
  21. 223
  22. 176
  23. 191
  24. 132
  25. 207
  26. 185
  27. 221
  28. 174
  29. 279
  30. 239
  31. 190
  32. 219
  33. 265
  34. 279
  35. 207
  36. 265
  37. 210
  38. 214
  39. 164
  40. 164

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