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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 670 · 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. 1.15 + 68 + 57 + 66 =
  2. 2.23 + 49 + 60 + 75 =
  3. 3.62 + 24 + 27 + 68 =
  4. 4.29 + 69 + 12 + 43 =
  5. 5.48 + 18 + 22 + 30 =
  6. 6.29 + 38 + 41 + 19 =
  7. 7.85 + 29 + 11 + 67 =
  8. 8.27 + 37 + 84 + 13 =
  9. 9.63 + 23 + 44 + 23 =
  10. 10.16 + 12 + 32 + 79 =
  11. 11.43 + 51 + 28 + 50 =
  12. 12.72 + 13 + 64 + 65 =
  13. 13.68 + 18 + 51 + 15 =
  14. 14.78 + 40 + 38 + 66 =
  15. 15.30 + 23 + 59 + 77 =
  16. 16.24 + 26 + 76 + 37 =
  17. 17.89 + 66 + 14 + 12 =
  18. 18.40 + 12 + 69 + 43 =
  19. 19.79 + 75 + 50 + 20 =
  20. 20.23 + 45 + 73 + 40 =
  21. 21.24 + 62 + 65 + 81 =
  22. 22.73 + 75 + 33 + 44 =
  23. 23.50 + 44 + 22 + 32 =
  24. 24.89 + 11 + 42 + 71 =
  25. 25.44 + 66 + 72 + 42 =
  26. 26.15 + 42 + 86 + 62 =
  27. 27.22 + 71 + 26 + 86 =
  28. 28.40 + 12 + 80 + 82 =
  29. 29.66 + 45 + 80 + 16 =
  30. 30.89 + 85 + 45 + 43 =
  31. 31.47 + 49 + 33 + 24 =
  32. 32.49 + 41 + 42 + 61 =
  33. 33.58 + 87 + 71 + 29 =
  34. 34.81 + 56 + 14 + 65 =
  35. 35.87 + 62 + 65 + 41 =
  36. 36.26 + 30 + 21 + 70 =
  37. 37.25 + 30 + 30 + 59 =
  38. 38.81 + 39 + 69 + 21 =
  39. 39.84 + 71 + 27 + 79 =
  40. 40.38 + 65 + 77 + 12 =

Answer key

  1. 206
  2. 207
  3. 181
  4. 153
  5. 118
  6. 127
  7. 192
  8. 161
  9. 153
  10. 139
  11. 172
  12. 214
  13. 152
  14. 222
  15. 189
  16. 163
  17. 181
  18. 164
  19. 224
  20. 181
  21. 232
  22. 225
  23. 148
  24. 213
  25. 224
  26. 205
  27. 205
  28. 214
  29. 207
  30. 262
  31. 153
  32. 193
  33. 245
  34. 216
  35. 255
  36. 147
  37. 144
  38. 210
  39. 261
  40. 192

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