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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 384 · 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. 1.78 + 24 + 55 + 14 =
  2. 2.67 + 22 + 29 + 37 =
  3. 3.16 + 66 + 86 + 89 =
  4. 4.31 + 16 + 67 + 56 =
  5. 5.78 + 82 + 15 + 54 =
  6. 6.30 + 68 + 27 + 19 =
  7. 7.23 + 18 + 78 + 85 =
  8. 8.64 + 47 + 71 + 17 =
  9. 9.20 + 44 + 71 + 81 =
  10. 10.73 + 42 + 68 + 45 =
  11. 11.53 + 13 + 67 + 52 =
  12. 12.54 + 87 + 16 + 33 =
  13. 13.70 + 60 + 11 + 56 =
  14. 14.12 + 83 + 65 + 83 =
  15. 15.11 + 83 + 22 + 31 =
  16. 16.12 + 54 + 28 + 22 =
  17. 17.68 + 86 + 31 + 67 =
  18. 18.48 + 14 + 22 + 52 =
  19. 19.31 + 28 + 70 + 44 =
  20. 20.53 + 29 + 80 + 33 =
  21. 21.43 + 69 + 40 + 37 =
  22. 22.55 + 83 + 67 + 23 =
  23. 23.25 + 48 + 27 + 34 =
  24. 24.11 + 26 + 85 + 76 =
  25. 25.35 + 73 + 73 + 54 =
  26. 26.17 + 31 + 55 + 81 =
  27. 27.68 + 62 + 41 + 50 =
  28. 28.50 + 18 + 30 + 65 =
  29. 29.39 + 16 + 84 + 37 =
  30. 30.17 + 16 + 30 + 61 =
  31. 31.81 + 44 + 60 + 67 =
  32. 32.15 + 85 + 14 + 58 =
  33. 33.46 + 24 + 41 + 42 =
  34. 34.34 + 17 + 85 + 19 =
  35. 35.26 + 82 + 84 + 20 =
  36. 36.88 + 76 + 43 + 51 =
  37. 37.68 + 74 + 38 + 21 =
  38. 38.49 + 62 + 20 + 11 =
  39. 39.14 + 82 + 31 + 87 =
  40. 40.19 + 35 + 37 + 21 =

Answer key

  1. 171
  2. 155
  3. 257
  4. 170
  5. 229
  6. 144
  7. 204
  8. 199
  9. 216
  10. 228
  11. 185
  12. 190
  13. 197
  14. 243
  15. 147
  16. 116
  17. 252
  18. 136
  19. 173
  20. 195
  21. 189
  22. 228
  23. 134
  24. 198
  25. 235
  26. 184
  27. 221
  28. 163
  29. 176
  30. 124
  31. 252
  32. 172
  33. 153
  34. 155
  35. 212
  36. 258
  37. 201
  38. 142
  39. 214
  40. 112

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