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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 424 · 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. 1.20 + 83 + 14 + 81 =
  2. 2.85 + 24 + 33 + 65 =
  3. 3.51 + 30 + 29 + 83 =
  4. 4.53 + 49 + 39 + 26 =
  5. 5.60 + 17 + 62 + 36 =
  6. 6.69 + 21 + 65 + 66 =
  7. 7.30 + 34 + 13 + 28 =
  8. 8.30 + 48 + 67 + 27 =
  9. 9.72 + 53 + 71 + 53 =
  10. 10.23 + 51 + 37 + 74 =
  11. 11.26 + 20 + 24 + 86 =
  12. 12.36 + 27 + 31 + 26 =
  13. 13.36 + 45 + 13 + 76 =
  14. 14.13 + 71 + 19 + 50 =
  15. 15.42 + 11 + 56 + 51 =
  16. 16.84 + 11 + 32 + 40 =
  17. 17.28 + 31 + 17 + 32 =
  18. 18.73 + 52 + 16 + 40 =
  19. 19.23 + 58 + 66 + 35 =
  20. 20.39 + 53 + 42 + 35 =
  21. 21.47 + 37 + 88 + 41 =
  22. 22.47 + 71 + 44 + 28 =
  23. 23.53 + 43 + 38 + 46 =
  24. 24.83 + 44 + 34 + 63 =
  25. 25.62 + 43 + 68 + 29 =
  26. 26.70 + 68 + 77 + 43 =
  27. 27.78 + 33 + 67 + 88 =
  28. 28.41 + 41 + 66 + 47 =
  29. 29.46 + 51 + 82 + 87 =
  30. 30.23 + 25 + 89 + 62 =
  31. 31.27 + 27 + 62 + 44 =
  32. 32.48 + 26 + 35 + 65 =
  33. 33.64 + 17 + 88 + 89 =
  34. 34.38 + 55 + 40 + 20 =
  35. 35.16 + 85 + 64 + 41 =
  36. 36.13 + 36 + 47 + 19 =
  37. 37.83 + 69 + 75 + 41 =
  38. 38.82 + 45 + 13 + 44 =
  39. 39.21 + 37 + 65 + 76 =
  40. 40.36 + 24 + 45 + 80 =

Answer key

  1. 198
  2. 207
  3. 193
  4. 167
  5. 175
  6. 221
  7. 105
  8. 172
  9. 249
  10. 185
  11. 156
  12. 120
  13. 170
  14. 153
  15. 160
  16. 167
  17. 108
  18. 181
  19. 182
  20. 169
  21. 213
  22. 190
  23. 180
  24. 224
  25. 202
  26. 258
  27. 266
  28. 195
  29. 266
  30. 199
  31. 160
  32. 174
  33. 258
  34. 153
  35. 206
  36. 115
  37. 268
  38. 184
  39. 199
  40. 185

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