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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 349 · 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. 1.27 + 39 + 26 + 47 =
  2. 2.56 + 39 + 33 + 14 =
  3. 3.32 + 59 + 27 + 35 =
  4. 4.35 + 40 + 72 + 81 =
  5. 5.33 + 37 + 20 + 44 =
  6. 6.53 + 26 + 22 + 63 =
  7. 7.30 + 14 + 78 + 49 =
  8. 8.25 + 54 + 88 + 37 =
  9. 9.65 + 82 + 57 + 15 =
  10. 10.39 + 23 + 70 + 76 =
  11. 11.76 + 18 + 20 + 54 =
  12. 12.68 + 44 + 49 + 79 =
  13. 13.77 + 15 + 26 + 12 =
  14. 14.25 + 48 + 87 + 48 =
  15. 15.23 + 78 + 80 + 61 =
  16. 16.59 + 26 + 29 + 52 =
  17. 17.67 + 76 + 14 + 38 =
  18. 18.76 + 13 + 16 + 18 =
  19. 19.15 + 87 + 21 + 78 =
  20. 20.44 + 45 + 24 + 41 =
  21. 21.73 + 57 + 19 + 42 =
  22. 22.85 + 87 + 57 + 28 =
  23. 23.31 + 21 + 88 + 19 =
  24. 24.78 + 86 + 21 + 23 =
  25. 25.88 + 34 + 76 + 82 =
  26. 26.68 + 77 + 23 + 86 =
  27. 27.61 + 70 + 16 + 45 =
  28. 28.87 + 35 + 22 + 74 =
  29. 29.80 + 15 + 42 + 49 =
  30. 30.26 + 68 + 14 + 21 =
  31. 31.37 + 44 + 87 + 56 =
  32. 32.84 + 82 + 78 + 35 =
  33. 33.35 + 29 + 51 + 34 =
  34. 34.32 + 86 + 84 + 47 =
  35. 35.45 + 25 + 76 + 28 =
  36. 36.81 + 82 + 20 + 28 =
  37. 37.21 + 27 + 49 + 26 =
  38. 38.58 + 25 + 71 + 48 =
  39. 39.32 + 52 + 31 + 25 =
  40. 40.65 + 49 + 51 + 76 =

Answer key

  1. 139
  2. 142
  3. 153
  4. 228
  5. 134
  6. 164
  7. 171
  8. 204
  9. 219
  10. 208
  11. 168
  12. 240
  13. 130
  14. 208
  15. 242
  16. 166
  17. 195
  18. 123
  19. 201
  20. 154
  21. 191
  22. 257
  23. 159
  24. 208
  25. 280
  26. 254
  27. 192
  28. 218
  29. 186
  30. 129
  31. 224
  32. 279
  33. 149
  34. 249
  35. 174
  36. 211
  37. 123
  38. 202
  39. 140
  40. 241

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