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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 537 · 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. 1.30 + 60 + 28 + 50 =
  2. 2.41 + 80 + 20 + 84 =
  3. 3.72 + 45 + 77 + 20 =
  4. 4.82 + 66 + 23 + 42 =
  5. 5.47 + 78 + 11 + 60 =
  6. 6.52 + 52 + 40 + 57 =
  7. 7.74 + 26 + 43 + 63 =
  8. 8.51 + 89 + 47 + 48 =
  9. 9.23 + 36 + 77 + 23 =
  10. 10.19 + 30 + 80 + 33 =
  11. 11.46 + 67 + 13 + 55 =
  12. 12.77 + 58 + 46 + 80 =
  13. 13.29 + 45 + 37 + 36 =
  14. 14.83 + 17 + 80 + 76 =
  15. 15.43 + 44 + 29 + 81 =
  16. 16.15 + 13 + 33 + 20 =
  17. 17.15 + 43 + 44 + 82 =
  18. 18.66 + 12 + 66 + 88 =
  19. 19.83 + 82 + 40 + 79 =
  20. 20.86 + 35 + 31 + 54 =
  21. 21.36 + 17 + 13 + 24 =
  22. 22.42 + 55 + 50 + 85 =
  23. 23.80 + 49 + 39 + 25 =
  24. 24.14 + 44 + 20 + 13 =
  25. 25.46 + 52 + 61 + 22 =
  26. 26.42 + 21 + 31 + 22 =
  27. 27.78 + 86 + 81 + 80 =
  28. 28.78 + 19 + 21 + 48 =
  29. 29.37 + 33 + 59 + 17 =
  30. 30.52 + 57 + 71 + 50 =
  31. 31.12 + 54 + 27 + 27 =
  32. 32.60 + 44 + 58 + 18 =
  33. 33.82 + 57 + 53 + 29 =
  34. 34.26 + 18 + 70 + 85 =
  35. 35.34 + 66 + 29 + 57 =
  36. 36.19 + 37 + 17 + 56 =
  37. 37.21 + 73 + 37 + 29 =
  38. 38.33 + 81 + 61 + 80 =
  39. 39.76 + 39 + 21 + 82 =
  40. 40.17 + 62 + 59 + 14 =

Answer key

  1. 168
  2. 225
  3. 214
  4. 213
  5. 196
  6. 201
  7. 206
  8. 235
  9. 159
  10. 162
  11. 181
  12. 261
  13. 147
  14. 256
  15. 197
  16. 81
  17. 184
  18. 232
  19. 284
  20. 206
  21. 90
  22. 232
  23. 193
  24. 91
  25. 181
  26. 116
  27. 325
  28. 166
  29. 146
  30. 230
  31. 120
  32. 180
  33. 221
  34. 199
  35. 186
  36. 129
  37. 160
  38. 255
  39. 218
  40. 152

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