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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 491 · 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. 1.76 + 16 + 12 + 32 =
  2. 2.64 + 31 + 39 + 49 =
  3. 3.11 + 62 + 37 + 19 =
  4. 4.30 + 27 + 86 + 21 =
  5. 5.25 + 33 + 51 + 58 =
  6. 6.70 + 57 + 11 + 32 =
  7. 7.20 + 66 + 38 + 37 =
  8. 8.66 + 78 + 22 + 59 =
  9. 9.13 + 64 + 82 + 25 =
  10. 10.46 + 56 + 49 + 77 =
  11. 11.13 + 57 + 52 + 18 =
  12. 12.21 + 30 + 26 + 25 =
  13. 13.50 + 85 + 15 + 40 =
  14. 14.49 + 40 + 49 + 79 =
  15. 15.72 + 17 + 14 + 60 =
  16. 16.48 + 31 + 89 + 77 =
  17. 17.15 + 23 + 40 + 40 =
  18. 18.72 + 59 + 85 + 83 =
  19. 19.45 + 60 + 41 + 29 =
  20. 20.26 + 43 + 62 + 42 =
  21. 21.15 + 76 + 54 + 48 =
  22. 22.45 + 78 + 62 + 71 =
  23. 23.23 + 78 + 62 + 15 =
  24. 24.80 + 35 + 61 + 81 =
  25. 25.46 + 76 + 87 + 14 =
  26. 26.62 + 12 + 19 + 17 =
  27. 27.56 + 11 + 44 + 34 =
  28. 28.76 + 42 + 89 + 19 =
  29. 29.63 + 14 + 63 + 20 =
  30. 30.77 + 45 + 26 + 18 =
  31. 31.44 + 42 + 42 + 22 =
  32. 32.41 + 83 + 54 + 58 =
  33. 33.35 + 48 + 14 + 72 =
  34. 34.82 + 85 + 41 + 58 =
  35. 35.48 + 37 + 83 + 42 =
  36. 36.21 + 23 + 56 + 57 =
  37. 37.46 + 41 + 39 + 68 =
  38. 38.83 + 61 + 81 + 40 =
  39. 39.46 + 59 + 73 + 42 =
  40. 40.86 + 49 + 87 + 60 =

Answer key

  1. 136
  2. 183
  3. 129
  4. 164
  5. 167
  6. 170
  7. 161
  8. 225
  9. 184
  10. 228
  11. 140
  12. 102
  13. 190
  14. 217
  15. 163
  16. 245
  17. 118
  18. 299
  19. 175
  20. 173
  21. 193
  22. 256
  23. 178
  24. 257
  25. 223
  26. 110
  27. 145
  28. 226
  29. 160
  30. 166
  31. 150
  32. 236
  33. 169
  34. 266
  35. 210
  36. 157
  37. 194
  38. 265
  39. 220
  40. 282

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