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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 708 · 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. 1.43 + 50 + 24 + 27 =
  2. 2.28 + 11 + 88 + 42 =
  3. 3.12 + 24 + 51 + 22 =
  4. 4.44 + 18 + 32 + 18 =
  5. 5.42 + 89 + 49 + 18 =
  6. 6.56 + 76 + 46 + 53 =
  7. 7.59 + 77 + 82 + 54 =
  8. 8.71 + 29 + 53 + 15 =
  9. 9.30 + 77 + 70 + 67 =
  10. 10.21 + 27 + 36 + 84 =
  11. 11.45 + 50 + 53 + 47 =
  12. 12.62 + 57 + 17 + 28 =
  13. 13.22 + 64 + 69 + 57 =
  14. 14.76 + 21 + 28 + 22 =
  15. 15.85 + 75 + 32 + 30 =
  16. 16.13 + 48 + 45 + 65 =
  17. 17.13 + 70 + 76 + 15 =
  18. 18.47 + 34 + 56 + 25 =
  19. 19.41 + 51 + 78 + 13 =
  20. 20.32 + 13 + 24 + 85 =
  21. 21.65 + 14 + 40 + 86 =
  22. 22.15 + 83 + 69 + 25 =
  23. 23.34 + 76 + 25 + 69 =
  24. 24.43 + 15 + 28 + 88 =
  25. 25.22 + 88 + 87 + 26 =
  26. 26.51 + 31 + 43 + 58 =
  27. 27.23 + 74 + 38 + 66 =
  28. 28.29 + 31 + 72 + 17 =
  29. 29.84 + 70 + 84 + 31 =
  30. 30.72 + 31 + 59 + 31 =
  31. 31.63 + 69 + 67 + 68 =
  32. 32.76 + 17 + 70 + 20 =
  33. 33.76 + 29 + 20 + 71 =
  34. 34.74 + 53 + 20 + 84 =
  35. 35.82 + 73 + 68 + 12 =
  36. 36.27 + 29 + 18 + 32 =
  37. 37.16 + 88 + 34 + 66 =
  38. 38.81 + 84 + 34 + 69 =
  39. 39.68 + 50 + 32 + 39 =
  40. 40.23 + 44 + 47 + 56 =

Answer key

  1. 144
  2. 169
  3. 109
  4. 112
  5. 198
  6. 231
  7. 272
  8. 168
  9. 244
  10. 168
  11. 195
  12. 164
  13. 212
  14. 147
  15. 222
  16. 171
  17. 174
  18. 162
  19. 183
  20. 154
  21. 205
  22. 192
  23. 204
  24. 174
  25. 223
  26. 183
  27. 201
  28. 149
  29. 269
  30. 193
  31. 267
  32. 183
  33. 196
  34. 231
  35. 235
  36. 106
  37. 204
  38. 268
  39. 189
  40. 170

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