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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 185 · 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. 1.67 + 61 + 71 + 42 =
  2. 2.76 + 25 + 61 + 88 =
  3. 3.31 + 59 + 43 + 25 =
  4. 4.28 + 28 + 27 + 89 =
  5. 5.54 + 29 + 32 + 20 =
  6. 6.80 + 73 + 13 + 30 =
  7. 7.23 + 14 + 20 + 73 =
  8. 8.78 + 34 + 83 + 40 =
  9. 9.71 + 16 + 76 + 12 =
  10. 10.61 + 25 + 53 + 46 =
  11. 11.87 + 80 + 38 + 58 =
  12. 12.51 + 41 + 43 + 75 =
  13. 13.25 + 20 + 17 + 44 =
  14. 14.32 + 29 + 22 + 84 =
  15. 15.26 + 72 + 76 + 18 =
  16. 16.40 + 57 + 55 + 82 =
  17. 17.15 + 24 + 39 + 35 =
  18. 18.80 + 70 + 71 + 77 =
  19. 19.66 + 45 + 76 + 50 =
  20. 20.74 + 22 + 68 + 58 =
  21. 21.40 + 24 + 35 + 53 =
  22. 22.11 + 35 + 85 + 32 =
  23. 23.24 + 54 + 21 + 65 =
  24. 24.63 + 11 + 14 + 81 =
  25. 25.49 + 67 + 78 + 58 =
  26. 26.82 + 48 + 76 + 36 =
  27. 27.36 + 20 + 69 + 68 =
  28. 28.31 + 50 + 69 + 45 =
  29. 29.57 + 16 + 72 + 72 =
  30. 30.81 + 52 + 11 + 16 =
  31. 31.73 + 76 + 83 + 27 =
  32. 32.86 + 72 + 47 + 89 =
  33. 33.48 + 20 + 57 + 67 =
  34. 34.38 + 84 + 56 + 11 =
  35. 35.11 + 86 + 19 + 86 =
  36. 36.30 + 47 + 53 + 30 =
  37. 37.58 + 34 + 45 + 32 =
  38. 38.56 + 30 + 67 + 18 =
  39. 39.83 + 20 + 11 + 25 =
  40. 40.60 + 22 + 30 + 40 =

Answer key

  1. 241
  2. 250
  3. 158
  4. 172
  5. 135
  6. 196
  7. 130
  8. 235
  9. 175
  10. 185
  11. 263
  12. 210
  13. 106
  14. 167
  15. 192
  16. 234
  17. 113
  18. 298
  19. 237
  20. 222
  21. 152
  22. 163
  23. 164
  24. 169
  25. 252
  26. 242
  27. 193
  28. 195
  29. 217
  30. 160
  31. 259
  32. 294
  33. 192
  34. 189
  35. 202
  36. 160
  37. 169
  38. 171
  39. 139
  40. 152

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