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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 300 · 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. 1.49 + 52 + 36 + 77 =
  2. 2.84 + 73 + 46 + 56 =
  3. 3.65 + 88 + 12 + 73 =
  4. 4.25 + 60 + 44 + 19 =
  5. 5.74 + 46 + 11 + 77 =
  6. 6.15 + 50 + 11 + 33 =
  7. 7.72 + 81 + 75 + 54 =
  8. 8.17 + 44 + 53 + 24 =
  9. 9.25 + 77 + 54 + 76 =
  10. 10.51 + 18 + 65 + 71 =
  11. 11.56 + 22 + 64 + 30 =
  12. 12.78 + 76 + 43 + 86 =
  13. 13.45 + 45 + 16 + 32 =
  14. 14.21 + 75 + 38 + 20 =
  15. 15.71 + 23 + 19 + 48 =
  16. 16.15 + 87 + 19 + 60 =
  17. 17.82 + 49 + 66 + 34 =
  18. 18.58 + 16 + 21 + 15 =
  19. 19.81 + 45 + 74 + 35 =
  20. 20.32 + 58 + 45 + 49 =
  21. 21.66 + 31 + 31 + 35 =
  22. 22.80 + 86 + 53 + 45 =
  23. 23.36 + 75 + 88 + 63 =
  24. 24.51 + 26 + 49 + 82 =
  25. 25.33 + 44 + 41 + 70 =
  26. 26.25 + 36 + 21 + 88 =
  27. 27.19 + 88 + 80 + 63 =
  28. 28.42 + 46 + 49 + 63 =
  29. 29.80 + 14 + 62 + 23 =
  30. 30.33 + 42 + 57 + 22 =
  31. 31.14 + 39 + 16 + 15 =
  32. 32.35 + 22 + 16 + 14 =
  33. 33.61 + 18 + 20 + 64 =
  34. 34.37 + 41 + 50 + 37 =
  35. 35.63 + 83 + 26 + 62 =
  36. 36.49 + 60 + 63 + 45 =
  37. 37.11 + 22 + 61 + 22 =
  38. 38.14 + 56 + 58 + 37 =
  39. 39.55 + 82 + 30 + 37 =
  40. 40.67 + 24 + 28 + 26 =

Answer key

  1. 214
  2. 259
  3. 238
  4. 148
  5. 208
  6. 109
  7. 282
  8. 138
  9. 232
  10. 205
  11. 172
  12. 283
  13. 138
  14. 154
  15. 161
  16. 181
  17. 231
  18. 110
  19. 235
  20. 184
  21. 163
  22. 264
  23. 262
  24. 208
  25. 188
  26. 170
  27. 250
  28. 200
  29. 179
  30. 154
  31. 84
  32. 87
  33. 163
  34. 165
  35. 234
  36. 217
  37. 116
  38. 165
  39. 204
  40. 145

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