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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 787 · 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. 1.37 + 47 + 33 + 57 =
  2. 2.49 + 17 + 19 + 68 =
  3. 3.86 + 77 + 87 + 34 =
  4. 4.21 + 75 + 25 + 52 =
  5. 5.78 + 88 + 13 + 51 =
  6. 6.52 + 41 + 80 + 82 =
  7. 7.24 + 74 + 29 + 74 =
  8. 8.39 + 55 + 40 + 56 =
  9. 9.87 + 29 + 38 + 73 =
  10. 10.77 + 44 + 79 + 41 =
  11. 11.22 + 85 + 68 + 49 =
  12. 12.16 + 31 + 23 + 89 =
  13. 13.47 + 23 + 85 + 56 =
  14. 14.44 + 82 + 44 + 55 =
  15. 15.80 + 88 + 70 + 36 =
  16. 16.77 + 75 + 37 + 34 =
  17. 17.57 + 28 + 23 + 34 =
  18. 18.18 + 18 + 57 + 26 =
  19. 19.83 + 23 + 27 + 57 =
  20. 20.28 + 36 + 50 + 54 =
  21. 21.80 + 64 + 49 + 63 =
  22. 22.13 + 35 + 25 + 26 =
  23. 23.84 + 62 + 33 + 77 =
  24. 24.40 + 23 + 53 + 11 =
  25. 25.61 + 29 + 56 + 76 =
  26. 26.32 + 50 + 59 + 12 =
  27. 27.52 + 84 + 33 + 28 =
  28. 28.73 + 21 + 53 + 82 =
  29. 29.54 + 52 + 61 + 45 =
  30. 30.31 + 40 + 56 + 65 =
  31. 31.15 + 46 + 28 + 21 =
  32. 32.14 + 44 + 75 + 66 =
  33. 33.70 + 77 + 82 + 20 =
  34. 34.24 + 46 + 67 + 38 =
  35. 35.43 + 64 + 12 + 29 =
  36. 36.29 + 47 + 46 + 19 =
  37. 37.17 + 34 + 75 + 24 =
  38. 38.19 + 52 + 53 + 56 =
  39. 39.20 + 63 + 49 + 42 =
  40. 40.30 + 73 + 42 + 18 =

Answer key

  1. 174
  2. 153
  3. 284
  4. 173
  5. 230
  6. 255
  7. 201
  8. 190
  9. 227
  10. 241
  11. 224
  12. 159
  13. 211
  14. 225
  15. 274
  16. 223
  17. 142
  18. 119
  19. 190
  20. 168
  21. 256
  22. 99
  23. 256
  24. 127
  25. 222
  26. 153
  27. 197
  28. 229
  29. 212
  30. 192
  31. 110
  32. 199
  33. 249
  34. 175
  35. 148
  36. 141
  37. 150
  38. 180
  39. 174
  40. 163

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