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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 777 · 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 + 34 + 54 + 74 =
  2. 2.44 + 16 + 89 + 71 =
  3. 3.83 + 18 + 47 + 42 =
  4. 4.41 + 43 + 75 + 21 =
  5. 5.76 + 76 + 53 + 46 =
  6. 6.34 + 31 + 46 + 53 =
  7. 7.65 + 14 + 77 + 39 =
  8. 8.70 + 35 + 80 + 86 =
  9. 9.21 + 70 + 27 + 15 =
  10. 10.36 + 15 + 63 + 45 =
  11. 11.39 + 41 + 27 + 66 =
  12. 12.14 + 18 + 13 + 80 =
  13. 13.28 + 52 + 60 + 84 =
  14. 14.11 + 52 + 20 + 54 =
  15. 15.88 + 24 + 64 + 12 =
  16. 16.25 + 46 + 28 + 28 =
  17. 17.74 + 78 + 33 + 79 =
  18. 18.22 + 46 + 21 + 62 =
  19. 19.33 + 53 + 25 + 22 =
  20. 20.78 + 52 + 24 + 19 =
  21. 21.44 + 26 + 20 + 83 =
  22. 22.71 + 81 + 67 + 54 =
  23. 23.17 + 24 + 49 + 89 =
  24. 24.51 + 74 + 50 + 27 =
  25. 25.46 + 64 + 78 + 50 =
  26. 26.59 + 67 + 50 + 29 =
  27. 27.52 + 75 + 37 + 37 =
  28. 28.54 + 87 + 78 + 22 =
  29. 29.64 + 33 + 13 + 89 =
  30. 30.55 + 68 + 55 + 80 =
  31. 31.78 + 68 + 28 + 60 =
  32. 32.67 + 54 + 44 + 88 =
  33. 33.20 + 75 + 79 + 79 =
  34. 34.45 + 26 + 85 + 18 =
  35. 35.87 + 57 + 39 + 88 =
  36. 36.16 + 85 + 23 + 46 =
  37. 37.25 + 28 + 77 + 59 =
  38. 38.53 + 35 + 84 + 42 =
  39. 39.15 + 59 + 23 + 71 =
  40. 40.45 + 70 + 57 + 25 =

Answer key

  1. 213
  2. 220
  3. 190
  4. 180
  5. 251
  6. 164
  7. 195
  8. 271
  9. 133
  10. 159
  11. 173
  12. 125
  13. 224
  14. 137
  15. 188
  16. 127
  17. 264
  18. 151
  19. 133
  20. 173
  21. 173
  22. 273
  23. 179
  24. 202
  25. 238
  26. 205
  27. 201
  28. 241
  29. 199
  30. 258
  31. 234
  32. 253
  33. 253
  34. 174
  35. 271
  36. 170
  37. 189
  38. 214
  39. 168
  40. 197

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