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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 779 · 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. 1.30 + 20 + 87 + 14 =
  2. 2.42 + 57 + 15 + 67 =
  3. 3.31 + 47 + 27 + 33 =
  4. 4.62 + 63 + 45 + 73 =
  5. 5.51 + 14 + 14 + 11 =
  6. 6.73 + 28 + 75 + 43 =
  7. 7.29 + 74 + 17 + 24 =
  8. 8.46 + 59 + 85 + 35 =
  9. 9.53 + 21 + 47 + 23 =
  10. 10.47 + 19 + 54 + 23 =
  11. 11.80 + 12 + 60 + 19 =
  12. 12.69 + 73 + 81 + 36 =
  13. 13.82 + 73 + 68 + 73 =
  14. 14.58 + 11 + 47 + 83 =
  15. 15.20 + 54 + 14 + 15 =
  16. 16.32 + 44 + 40 + 55 =
  17. 17.21 + 88 + 71 + 40 =
  18. 18.41 + 30 + 11 + 73 =
  19. 19.65 + 69 + 33 + 28 =
  20. 20.71 + 21 + 28 + 80 =
  21. 21.45 + 40 + 21 + 36 =
  22. 22.31 + 87 + 66 + 51 =
  23. 23.18 + 11 + 34 + 59 =
  24. 24.19 + 78 + 66 + 20 =
  25. 25.77 + 13 + 14 + 31 =
  26. 26.51 + 23 + 33 + 72 =
  27. 27.43 + 76 + 40 + 52 =
  28. 28.62 + 84 + 16 + 66 =
  29. 29.34 + 67 + 43 + 52 =
  30. 30.46 + 63 + 44 + 43 =
  31. 31.70 + 78 + 38 + 72 =
  32. 32.87 + 26 + 20 + 84 =
  33. 33.15 + 77 + 82 + 89 =
  34. 34.24 + 28 + 77 + 74 =
  35. 35.16 + 60 + 19 + 78 =
  36. 36.27 + 27 + 56 + 85 =
  37. 37.87 + 36 + 84 + 15 =
  38. 38.40 + 33 + 27 + 23 =
  39. 39.52 + 81 + 64 + 57 =
  40. 40.47 + 77 + 47 + 73 =

Answer key

  1. 151
  2. 181
  3. 138
  4. 243
  5. 90
  6. 219
  7. 144
  8. 225
  9. 144
  10. 143
  11. 171
  12. 259
  13. 296
  14. 199
  15. 103
  16. 171
  17. 220
  18. 155
  19. 195
  20. 200
  21. 142
  22. 235
  23. 122
  24. 183
  25. 135
  26. 179
  27. 211
  28. 228
  29. 196
  30. 196
  31. 258
  32. 217
  33. 263
  34. 203
  35. 173
  36. 195
  37. 222
  38. 123
  39. 254
  40. 244

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