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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 134 · 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. 1.44 + 16 + 23 + 32 =
  2. 2.26 + 19 + 37 + 17 =
  3. 3.13 + 36 + 19 + 35 =
  4. 4.68 + 68 + 44 + 38 =
  5. 5.89 + 52 + 83 + 31 =
  6. 6.31 + 33 + 28 + 88 =
  7. 7.16 + 64 + 42 + 56 =
  8. 8.85 + 83 + 64 + 89 =
  9. 9.29 + 74 + 54 + 21 =
  10. 10.35 + 18 + 43 + 36 =
  11. 11.89 + 48 + 18 + 57 =
  12. 12.79 + 75 + 70 + 76 =
  13. 13.86 + 56 + 74 + 15 =
  14. 14.16 + 61 + 74 + 15 =
  15. 15.51 + 77 + 59 + 12 =
  16. 16.11 + 49 + 60 + 44 =
  17. 17.21 + 66 + 58 + 76 =
  18. 18.74 + 20 + 28 + 80 =
  19. 19.73 + 29 + 23 + 20 =
  20. 20.48 + 11 + 66 + 38 =
  21. 21.33 + 44 + 75 + 84 =
  22. 22.62 + 20 + 65 + 22 =
  23. 23.37 + 13 + 89 + 49 =
  24. 24.57 + 56 + 77 + 50 =
  25. 25.88 + 12 + 48 + 14 =
  26. 26.53 + 70 + 73 + 78 =
  27. 27.32 + 25 + 12 + 80 =
  28. 28.84 + 86 + 82 + 49 =
  29. 29.36 + 36 + 65 + 68 =
  30. 30.41 + 89 + 14 + 34 =
  31. 31.30 + 24 + 13 + 51 =
  32. 32.38 + 22 + 46 + 78 =
  33. 33.21 + 45 + 23 + 62 =
  34. 34.38 + 56 + 64 + 14 =
  35. 35.64 + 31 + 27 + 28 =
  36. 36.50 + 48 + 23 + 47 =
  37. 37.57 + 13 + 45 + 23 =
  38. 38.65 + 15 + 40 + 84 =
  39. 39.20 + 25 + 58 + 29 =
  40. 40.57 + 37 + 25 + 31 =

Answer key

  1. 115
  2. 99
  3. 103
  4. 218
  5. 255
  6. 180
  7. 178
  8. 321
  9. 178
  10. 132
  11. 212
  12. 300
  13. 231
  14. 166
  15. 199
  16. 164
  17. 221
  18. 202
  19. 145
  20. 163
  21. 236
  22. 169
  23. 188
  24. 240
  25. 162
  26. 274
  27. 149
  28. 301
  29. 205
  30. 178
  31. 118
  32. 184
  33. 151
  34. 172
  35. 150
  36. 168
  37. 138
  38. 204
  39. 132
  40. 150

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