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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 425 · 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. 1.31 + 17 + 22 + 67 =
  2. 2.46 + 71 + 76 + 30 =
  3. 3.57 + 82 + 54 + 11 =
  4. 4.55 + 24 + 27 + 29 =
  5. 5.65 + 86 + 85 + 27 =
  6. 6.11 + 56 + 78 + 24 =
  7. 7.46 + 30 + 43 + 14 =
  8. 8.70 + 55 + 47 + 27 =
  9. 9.42 + 13 + 45 + 78 =
  10. 10.31 + 65 + 83 + 61 =
  11. 11.45 + 68 + 89 + 20 =
  12. 12.30 + 22 + 23 + 82 =
  13. 13.16 + 13 + 30 + 35 =
  14. 14.65 + 33 + 19 + 29 =
  15. 15.30 + 63 + 81 + 83 =
  16. 16.73 + 14 + 67 + 33 =
  17. 17.50 + 73 + 22 + 59 =
  18. 18.22 + 80 + 19 + 48 =
  19. 19.63 + 45 + 39 + 14 =
  20. 20.54 + 17 + 56 + 36 =
  21. 21.36 + 13 + 19 + 63 =
  22. 22.50 + 55 + 87 + 81 =
  23. 23.36 + 26 + 42 + 67 =
  24. 24.53 + 46 + 68 + 28 =
  25. 25.28 + 53 + 33 + 46 =
  26. 26.61 + 46 + 85 + 87 =
  27. 27.58 + 55 + 14 + 20 =
  28. 28.37 + 37 + 34 + 19 =
  29. 29.59 + 30 + 15 + 26 =
  30. 30.26 + 15 + 35 + 89 =
  31. 31.41 + 80 + 29 + 69 =
  32. 32.12 + 68 + 78 + 79 =
  33. 33.80 + 12 + 31 + 74 =
  34. 34.11 + 37 + 42 + 32 =
  35. 35.28 + 12 + 40 + 61 =
  36. 36.33 + 76 + 89 + 19 =
  37. 37.31 + 20 + 30 + 75 =
  38. 38.76 + 83 + 72 + 31 =
  39. 39.70 + 12 + 28 + 43 =
  40. 40.79 + 30 + 36 + 50 =

Answer key

  1. 137
  2. 223
  3. 204
  4. 135
  5. 263
  6. 169
  7. 133
  8. 199
  9. 178
  10. 240
  11. 222
  12. 157
  13. 94
  14. 146
  15. 257
  16. 187
  17. 204
  18. 169
  19. 161
  20. 163
  21. 131
  22. 273
  23. 171
  24. 195
  25. 160
  26. 279
  27. 147
  28. 127
  29. 130
  30. 165
  31. 219
  32. 237
  33. 197
  34. 122
  35. 141
  36. 217
  37. 156
  38. 262
  39. 153
  40. 195

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