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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 155 · 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. 1.41 + 54 + 17 + 83 =
  2. 2.39 + 47 + 48 + 24 =
  3. 3.12 + 17 + 86 + 77 =
  4. 4.15 + 23 + 70 + 19 =
  5. 5.18 + 50 + 58 + 50 =
  6. 6.45 + 77 + 17 + 74 =
  7. 7.21 + 39 + 13 + 85 =
  8. 8.56 + 52 + 15 + 79 =
  9. 9.12 + 52 + 54 + 30 =
  10. 10.71 + 51 + 80 + 16 =
  11. 11.30 + 43 + 88 + 52 =
  12. 12.23 + 23 + 11 + 77 =
  13. 13.17 + 29 + 56 + 81 =
  14. 14.11 + 44 + 48 + 52 =
  15. 15.43 + 41 + 62 + 58 =
  16. 16.42 + 49 + 17 + 62 =
  17. 17.56 + 67 + 84 + 72 =
  18. 18.78 + 77 + 29 + 27 =
  19. 19.18 + 49 + 78 + 26 =
  20. 20.39 + 60 + 26 + 75 =
  21. 21.20 + 25 + 37 + 32 =
  22. 22.34 + 42 + 47 + 13 =
  23. 23.19 + 27 + 83 + 87 =
  24. 24.85 + 39 + 46 + 11 =
  25. 25.67 + 67 + 82 + 59 =
  26. 26.14 + 76 + 87 + 48 =
  27. 27.36 + 62 + 16 + 81 =
  28. 28.87 + 28 + 83 + 24 =
  29. 29.41 + 52 + 43 + 36 =
  30. 30.57 + 64 + 69 + 53 =
  31. 31.46 + 45 + 81 + 41 =
  32. 32.23 + 25 + 65 + 70 =
  33. 33.23 + 53 + 77 + 86 =
  34. 34.42 + 63 + 56 + 55 =
  35. 35.24 + 34 + 58 + 19 =
  36. 36.36 + 65 + 73 + 80 =
  37. 37.55 + 24 + 51 + 34 =
  38. 38.50 + 25 + 60 + 24 =
  39. 39.69 + 56 + 30 + 82 =
  40. 40.17 + 72 + 53 + 63 =

Answer key

  1. 195
  2. 158
  3. 192
  4. 127
  5. 176
  6. 213
  7. 158
  8. 202
  9. 148
  10. 218
  11. 213
  12. 134
  13. 183
  14. 155
  15. 204
  16. 170
  17. 279
  18. 211
  19. 171
  20. 200
  21. 114
  22. 136
  23. 216
  24. 181
  25. 275
  26. 225
  27. 195
  28. 222
  29. 172
  30. 243
  31. 213
  32. 183
  33. 239
  34. 216
  35. 135
  36. 254
  37. 164
  38. 159
  39. 237
  40. 205

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