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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 570 · 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. 1.69 + 42 + 81 + 26 =
  2. 2.67 + 14 + 53 + 63 =
  3. 3.63 + 82 + 85 + 43 =
  4. 4.85 + 64 + 50 + 80 =
  5. 5.86 + 56 + 36 + 33 =
  6. 6.38 + 73 + 32 + 54 =
  7. 7.51 + 21 + 51 + 43 =
  8. 8.42 + 63 + 57 + 42 =
  9. 9.86 + 36 + 68 + 79 =
  10. 10.13 + 81 + 30 + 47 =
  11. 11.61 + 26 + 36 + 58 =
  12. 12.29 + 52 + 39 + 55 =
  13. 13.57 + 61 + 64 + 43 =
  14. 14.70 + 81 + 65 + 79 =
  15. 15.39 + 56 + 13 + 76 =
  16. 16.17 + 73 + 82 + 22 =
  17. 17.35 + 54 + 25 + 23 =
  18. 18.36 + 36 + 82 + 57 =
  19. 19.63 + 51 + 16 + 55 =
  20. 20.41 + 43 + 32 + 41 =
  21. 21.65 + 21 + 11 + 13 =
  22. 22.33 + 14 + 36 + 86 =
  23. 23.56 + 48 + 63 + 55 =
  24. 24.19 + 46 + 58 + 29 =
  25. 25.11 + 69 + 67 + 25 =
  26. 26.42 + 76 + 85 + 65 =
  27. 27.86 + 67 + 19 + 38 =
  28. 28.25 + 89 + 16 + 17 =
  29. 29.49 + 70 + 74 + 75 =
  30. 30.13 + 56 + 53 + 83 =
  31. 31.46 + 20 + 19 + 21 =
  32. 32.49 + 12 + 11 + 27 =
  33. 33.62 + 49 + 26 + 82 =
  34. 34.14 + 23 + 58 + 54 =
  35. 35.20 + 46 + 72 + 26 =
  36. 36.42 + 58 + 26 + 21 =
  37. 37.21 + 29 + 12 + 58 =
  38. 38.20 + 41 + 58 + 76 =
  39. 39.15 + 58 + 24 + 89 =
  40. 40.74 + 38 + 42 + 30 =

Answer key

  1. 218
  2. 197
  3. 273
  4. 279
  5. 211
  6. 197
  7. 166
  8. 204
  9. 269
  10. 171
  11. 181
  12. 175
  13. 225
  14. 295
  15. 184
  16. 194
  17. 137
  18. 211
  19. 185
  20. 157
  21. 110
  22. 169
  23. 222
  24. 152
  25. 172
  26. 268
  27. 210
  28. 147
  29. 268
  30. 205
  31. 106
  32. 99
  33. 219
  34. 149
  35. 164
  36. 147
  37. 120
  38. 195
  39. 186
  40. 184

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