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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 473 · 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. 1.45 + 13 + 27 + 71 =
  2. 2.25 + 18 + 17 + 46 =
  3. 3.30 + 32 + 30 + 53 =
  4. 4.21 + 80 + 49 + 77 =
  5. 5.17 + 82 + 38 + 54 =
  6. 6.27 + 55 + 35 + 37 =
  7. 7.73 + 80 + 69 + 61 =
  8. 8.28 + 87 + 67 + 12 =
  9. 9.44 + 11 + 51 + 40 =
  10. 10.19 + 25 + 60 + 22 =
  11. 11.70 + 78 + 33 + 20 =
  12. 12.34 + 48 + 59 + 61 =
  13. 13.41 + 44 + 71 + 32 =
  14. 14.41 + 58 + 23 + 86 =
  15. 15.85 + 37 + 43 + 51 =
  16. 16.46 + 55 + 35 + 78 =
  17. 17.41 + 45 + 20 + 16 =
  18. 18.38 + 80 + 20 + 15 =
  19. 19.45 + 16 + 60 + 40 =
  20. 20.88 + 28 + 53 + 36 =
  21. 21.58 + 13 + 66 + 48 =
  22. 22.68 + 40 + 23 + 57 =
  23. 23.37 + 82 + 18 + 87 =
  24. 24.50 + 29 + 78 + 51 =
  25. 25.15 + 57 + 85 + 66 =
  26. 26.88 + 23 + 88 + 35 =
  27. 27.25 + 51 + 16 + 50 =
  28. 28.57 + 60 + 70 + 83 =
  29. 29.38 + 43 + 42 + 22 =
  30. 30.77 + 32 + 89 + 21 =
  31. 31.76 + 48 + 76 + 80 =
  32. 32.48 + 28 + 26 + 36 =
  33. 33.81 + 50 + 72 + 52 =
  34. 34.17 + 74 + 48 + 52 =
  35. 35.55 + 69 + 23 + 30 =
  36. 36.45 + 17 + 62 + 59 =
  37. 37.48 + 48 + 47 + 34 =
  38. 38.76 + 20 + 13 + 86 =
  39. 39.48 + 31 + 76 + 36 =
  40. 40.41 + 71 + 69 + 56 =

Answer key

  1. 156
  2. 106
  3. 145
  4. 227
  5. 191
  6. 154
  7. 283
  8. 194
  9. 146
  10. 126
  11. 201
  12. 202
  13. 188
  14. 208
  15. 216
  16. 214
  17. 122
  18. 153
  19. 161
  20. 205
  21. 185
  22. 188
  23. 224
  24. 208
  25. 223
  26. 234
  27. 142
  28. 270
  29. 145
  30. 219
  31. 280
  32. 138
  33. 255
  34. 191
  35. 177
  36. 183
  37. 177
  38. 195
  39. 191
  40. 237

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