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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 773 · 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. 1.48 + 24 + 51 + 44 =
  2. 2.13 + 25 + 78 + 88 =
  3. 3.29 + 57 + 50 + 48 =
  4. 4.70 + 50 + 70 + 13 =
  5. 5.41 + 89 + 22 + 18 =
  6. 6.82 + 16 + 32 + 68 =
  7. 7.12 + 81 + 18 + 88 =
  8. 8.37 + 17 + 34 + 32 =
  9. 9.65 + 74 + 44 + 49 =
  10. 10.81 + 22 + 57 + 80 =
  11. 11.40 + 11 + 24 + 11 =
  12. 12.49 + 56 + 57 + 21 =
  13. 13.31 + 13 + 39 + 67 =
  14. 14.41 + 55 + 66 + 33 =
  15. 15.89 + 54 + 76 + 53 =
  16. 16.18 + 81 + 37 + 25 =
  17. 17.79 + 77 + 48 + 47 =
  18. 18.87 + 24 + 45 + 67 =
  19. 19.76 + 66 + 15 + 88 =
  20. 20.34 + 69 + 74 + 78 =
  21. 21.19 + 19 + 75 + 60 =
  22. 22.41 + 82 + 29 + 75 =
  23. 23.25 + 18 + 46 + 88 =
  24. 24.45 + 73 + 23 + 60 =
  25. 25.89 + 88 + 30 + 25 =
  26. 26.31 + 19 + 27 + 48 =
  27. 27.40 + 11 + 68 + 56 =
  28. 28.58 + 22 + 45 + 46 =
  29. 29.26 + 54 + 53 + 31 =
  30. 30.80 + 53 + 52 + 25 =
  31. 31.65 + 35 + 28 + 59 =
  32. 32.70 + 64 + 65 + 52 =
  33. 33.51 + 74 + 68 + 19 =
  34. 34.89 + 43 + 26 + 79 =
  35. 35.29 + 12 + 33 + 13 =
  36. 36.63 + 31 + 88 + 34 =
  37. 37.63 + 52 + 83 + 25 =
  38. 38.45 + 47 + 75 + 78 =
  39. 39.21 + 30 + 22 + 29 =
  40. 40.20 + 27 + 29 + 72 =

Answer key

  1. 167
  2. 204
  3. 184
  4. 203
  5. 170
  6. 198
  7. 199
  8. 120
  9. 232
  10. 240
  11. 86
  12. 183
  13. 150
  14. 195
  15. 272
  16. 161
  17. 251
  18. 223
  19. 245
  20. 255
  21. 173
  22. 227
  23. 177
  24. 201
  25. 232
  26. 125
  27. 175
  28. 171
  29. 164
  30. 210
  31. 187
  32. 251
  33. 212
  34. 237
  35. 87
  36. 216
  37. 223
  38. 245
  39. 102
  40. 148

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