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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 169 · 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. 1.59 + 72 + 17 + 28 =
  2. 2.59 + 34 + 11 + 39 =
  3. 3.80 + 81 + 20 + 17 =
  4. 4.70 + 84 + 30 + 13 =
  5. 5.56 + 52 + 12 + 21 =
  6. 6.57 + 48 + 23 + 51 =
  7. 7.42 + 24 + 60 + 15 =
  8. 8.16 + 58 + 68 + 64 =
  9. 9.64 + 23 + 33 + 18 =
  10. 10.50 + 70 + 57 + 78 =
  11. 11.19 + 59 + 27 + 87 =
  12. 12.52 + 20 + 89 + 22 =
  13. 13.89 + 72 + 67 + 45 =
  14. 14.42 + 88 + 88 + 18 =
  15. 15.75 + 80 + 72 + 44 =
  16. 16.40 + 11 + 80 + 49 =
  17. 17.38 + 50 + 21 + 33 =
  18. 18.13 + 61 + 54 + 82 =
  19. 19.30 + 51 + 51 + 30 =
  20. 20.79 + 66 + 35 + 20 =
  21. 21.67 + 87 + 61 + 49 =
  22. 22.30 + 45 + 27 + 87 =
  23. 23.76 + 72 + 24 + 44 =
  24. 24.46 + 51 + 68 + 33 =
  25. 25.31 + 82 + 41 + 78 =
  26. 26.34 + 43 + 72 + 60 =
  27. 27.23 + 28 + 11 + 16 =
  28. 28.65 + 51 + 83 + 22 =
  29. 29.69 + 51 + 62 + 44 =
  30. 30.11 + 14 + 35 + 62 =
  31. 31.44 + 26 + 71 + 37 =
  32. 32.27 + 66 + 34 + 66 =
  33. 33.30 + 25 + 70 + 49 =
  34. 34.37 + 22 + 23 + 28 =
  35. 35.27 + 17 + 16 + 21 =
  36. 36.57 + 33 + 80 + 89 =
  37. 37.11 + 88 + 25 + 23 =
  38. 38.77 + 67 + 80 + 79 =
  39. 39.70 + 29 + 48 + 79 =
  40. 40.44 + 67 + 25 + 19 =

Answer key

  1. 176
  2. 143
  3. 198
  4. 197
  5. 141
  6. 179
  7. 141
  8. 206
  9. 138
  10. 255
  11. 192
  12. 183
  13. 273
  14. 236
  15. 271
  16. 180
  17. 142
  18. 210
  19. 162
  20. 200
  21. 264
  22. 189
  23. 216
  24. 198
  25. 232
  26. 209
  27. 78
  28. 221
  29. 226
  30. 122
  31. 178
  32. 193
  33. 174
  34. 110
  35. 81
  36. 259
  37. 147
  38. 303
  39. 226
  40. 155

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