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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 296 · 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. 1.51 + 74 + 80 + 32 =
  2. 2.79 + 29 + 14 + 23 =
  3. 3.30 + 19 + 30 + 55 =
  4. 4.76 + 14 + 62 + 15 =
  5. 5.15 + 17 + 61 + 48 =
  6. 6.28 + 62 + 69 + 24 =
  7. 7.33 + 26 + 34 + 60 =
  8. 8.75 + 28 + 12 + 20 =
  9. 9.24 + 22 + 68 + 56 =
  10. 10.34 + 44 + 60 + 39 =
  11. 11.23 + 62 + 26 + 37 =
  12. 12.42 + 25 + 19 + 50 =
  13. 13.18 + 39 + 55 + 26 =
  14. 14.54 + 82 + 22 + 42 =
  15. 15.86 + 65 + 83 + 36 =
  16. 16.40 + 26 + 89 + 78 =
  17. 17.86 + 46 + 74 + 14 =
  18. 18.30 + 50 + 81 + 28 =
  19. 19.31 + 85 + 56 + 30 =
  20. 20.71 + 28 + 68 + 12 =
  21. 21.42 + 12 + 58 + 18 =
  22. 22.49 + 43 + 69 + 44 =
  23. 23.87 + 74 + 69 + 73 =
  24. 24.27 + 86 + 68 + 38 =
  25. 25.17 + 83 + 77 + 74 =
  26. 26.55 + 34 + 80 + 12 =
  27. 27.76 + 11 + 56 + 87 =
  28. 28.21 + 83 + 52 + 44 =
  29. 29.75 + 47 + 22 + 63 =
  30. 30.87 + 87 + 15 + 21 =
  31. 31.43 + 87 + 57 + 13 =
  32. 32.86 + 49 + 82 + 73 =
  33. 33.31 + 36 + 80 + 17 =
  34. 34.80 + 68 + 45 + 28 =
  35. 35.80 + 53 + 24 + 28 =
  36. 36.51 + 33 + 88 + 32 =
  37. 37.32 + 21 + 33 + 51 =
  38. 38.29 + 77 + 60 + 32 =
  39. 39.29 + 19 + 22 + 53 =
  40. 40.85 + 63 + 32 + 88 =

Answer key

  1. 237
  2. 145
  3. 134
  4. 167
  5. 141
  6. 183
  7. 153
  8. 135
  9. 170
  10. 177
  11. 148
  12. 136
  13. 138
  14. 200
  15. 270
  16. 233
  17. 220
  18. 189
  19. 202
  20. 179
  21. 130
  22. 205
  23. 303
  24. 219
  25. 251
  26. 181
  27. 230
  28. 200
  29. 207
  30. 210
  31. 200
  32. 290
  33. 164
  34. 221
  35. 185
  36. 204
  37. 137
  38. 198
  39. 123
  40. 268

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