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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 216 · 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. 1.74 + 85 + 71 + 13 =
  2. 2.43 + 16 + 39 + 82 =
  3. 3.28 + 51 + 88 + 32 =
  4. 4.48 + 30 + 49 + 47 =
  5. 5.38 + 28 + 15 + 25 =
  6. 6.47 + 47 + 33 + 19 =
  7. 7.28 + 87 + 58 + 34 =
  8. 8.21 + 32 + 67 + 80 =
  9. 9.44 + 37 + 58 + 82 =
  10. 10.83 + 82 + 36 + 63 =
  11. 11.52 + 12 + 37 + 70 =
  12. 12.63 + 34 + 29 + 19 =
  13. 13.59 + 88 + 35 + 34 =
  14. 14.53 + 64 + 56 + 74 =
  15. 15.26 + 57 + 34 + 30 =
  16. 16.24 + 18 + 69 + 20 =
  17. 17.11 + 24 + 73 + 26 =
  18. 18.76 + 71 + 76 + 89 =
  19. 19.33 + 83 + 15 + 36 =
  20. 20.51 + 15 + 68 + 15 =
  21. 21.88 + 38 + 28 + 65 =
  22. 22.65 + 39 + 35 + 21 =
  23. 23.80 + 57 + 24 + 31 =
  24. 24.53 + 62 + 38 + 87 =
  25. 25.16 + 76 + 38 + 25 =
  26. 26.29 + 47 + 51 + 70 =
  27. 27.75 + 59 + 11 + 15 =
  28. 28.42 + 16 + 44 + 24 =
  29. 29.82 + 73 + 33 + 21 =
  30. 30.49 + 33 + 84 + 24 =
  31. 31.30 + 84 + 27 + 63 =
  32. 32.73 + 21 + 44 + 78 =
  33. 33.61 + 85 + 75 + 78 =
  34. 34.37 + 67 + 76 + 36 =
  35. 35.86 + 77 + 58 + 30 =
  36. 36.74 + 11 + 56 + 61 =
  37. 37.30 + 15 + 18 + 55 =
  38. 38.34 + 83 + 73 + 18 =
  39. 39.19 + 64 + 41 + 11 =
  40. 40.51 + 76 + 80 + 73 =

Answer key

  1. 243
  2. 180
  3. 199
  4. 174
  5. 106
  6. 146
  7. 207
  8. 200
  9. 221
  10. 264
  11. 171
  12. 145
  13. 216
  14. 247
  15. 147
  16. 131
  17. 134
  18. 312
  19. 167
  20. 149
  21. 219
  22. 160
  23. 192
  24. 240
  25. 155
  26. 197
  27. 160
  28. 126
  29. 209
  30. 190
  31. 204
  32. 216
  33. 299
  34. 216
  35. 251
  36. 202
  37. 118
  38. 208
  39. 135
  40. 280

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