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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 2 · 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 + 39 + 47 + 24 =
  2. 2.61 + 41 + 75 + 47 =
  3. 3.22 + 74 + 16 + 13 =
  4. 4.84 + 85 + 46 + 65 =
  5. 5.72 + 18 + 52 + 88 =
  6. 6.49 + 87 + 32 + 56 =
  7. 7.64 + 46 + 64 + 52 =
  8. 8.15 + 11 + 86 + 66 =
  9. 9.53 + 79 + 80 + 56 =
  10. 10.39 + 19 + 24 + 62 =
  11. 11.55 + 81 + 74 + 43 =
  12. 12.24 + 24 + 81 + 18 =
  13. 13.21 + 24 + 52 + 49 =
  14. 14.56 + 15 + 17 + 31 =
  15. 15.20 + 55 + 15 + 20 =
  16. 16.73 + 72 + 70 + 50 =
  17. 17.46 + 21 + 73 + 18 =
  18. 18.19 + 25 + 81 + 39 =
  19. 19.26 + 66 + 80 + 28 =
  20. 20.75 + 36 + 22 + 20 =
  21. 21.31 + 74 + 67 + 45 =
  22. 22.51 + 14 + 54 + 70 =
  23. 23.61 + 13 + 58 + 52 =
  24. 24.23 + 19 + 86 + 86 =
  25. 25.37 + 17 + 28 + 22 =
  26. 26.86 + 46 + 33 + 69 =
  27. 27.69 + 23 + 76 + 33 =
  28. 28.64 + 82 + 56 + 74 =
  29. 29.41 + 32 + 16 + 81 =
  30. 30.17 + 27 + 42 + 15 =
  31. 31.38 + 45 + 51 + 72 =
  32. 32.71 + 69 + 29 + 37 =
  33. 33.73 + 50 + 47 + 22 =
  34. 34.58 + 34 + 15 + 55 =
  35. 35.56 + 65 + 65 + 29 =
  36. 36.87 + 34 + 38 + 30 =
  37. 37.80 + 27 + 48 + 70 =
  38. 38.14 + 33 + 58 + 64 =
  39. 39.42 + 71 + 83 + 46 =
  40. 40.26 + 16 + 74 + 23 =

Answer key

  1. 179
  2. 224
  3. 125
  4. 280
  5. 230
  6. 224
  7. 226
  8. 178
  9. 268
  10. 144
  11. 253
  12. 147
  13. 146
  14. 119
  15. 110
  16. 265
  17. 158
  18. 164
  19. 200
  20. 153
  21. 217
  22. 189
  23. 184
  24. 214
  25. 104
  26. 234
  27. 201
  28. 276
  29. 170
  30. 101
  31. 206
  32. 206
  33. 192
  34. 162
  35. 215
  36. 189
  37. 225
  38. 169
  39. 242
  40. 139

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