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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 47 · 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. 1.20 + 53 + 27 + 72 =
  2. 2.27 + 17 + 46 + 66 =
  3. 3.83 + 24 + 13 + 73 =
  4. 4.17 + 24 + 37 + 52 =
  5. 5.69 + 14 + 12 + 68 =
  6. 6.40 + 82 + 20 + 33 =
  7. 7.77 + 37 + 45 + 43 =
  8. 8.58 + 40 + 30 + 41 =
  9. 9.78 + 23 + 63 + 75 =
  10. 10.32 + 18 + 89 + 27 =
  11. 11.86 + 37 + 56 + 45 =
  12. 12.51 + 29 + 13 + 30 =
  13. 13.19 + 72 + 29 + 71 =
  14. 14.53 + 63 + 11 + 54 =
  15. 15.87 + 66 + 63 + 82 =
  16. 16.49 + 71 + 85 + 19 =
  17. 17.51 + 33 + 54 + 76 =
  18. 18.50 + 11 + 47 + 67 =
  19. 19.67 + 14 + 57 + 45 =
  20. 20.51 + 77 + 32 + 80 =
  21. 21.36 + 80 + 45 + 34 =
  22. 22.72 + 27 + 20 + 36 =
  23. 23.17 + 44 + 69 + 34 =
  24. 24.69 + 35 + 19 + 32 =
  25. 25.11 + 24 + 84 + 11 =
  26. 26.28 + 20 + 71 + 19 =
  27. 27.62 + 50 + 58 + 37 =
  28. 28.19 + 72 + 35 + 44 =
  29. 29.86 + 48 + 44 + 66 =
  30. 30.12 + 21 + 71 + 11 =
  31. 31.51 + 33 + 27 + 75 =
  32. 32.87 + 29 + 17 + 40 =
  33. 33.24 + 33 + 87 + 52 =
  34. 34.30 + 83 + 66 + 84 =
  35. 35.24 + 40 + 60 + 81 =
  36. 36.63 + 74 + 86 + 17 =
  37. 37.61 + 36 + 72 + 16 =
  38. 38.22 + 83 + 26 + 21 =
  39. 39.23 + 48 + 12 + 71 =
  40. 40.21 + 40 + 21 + 28 =

Answer key

  1. 172
  2. 156
  3. 193
  4. 130
  5. 163
  6. 175
  7. 202
  8. 169
  9. 239
  10. 166
  11. 224
  12. 123
  13. 191
  14. 181
  15. 298
  16. 224
  17. 214
  18. 175
  19. 183
  20. 240
  21. 195
  22. 155
  23. 164
  24. 155
  25. 130
  26. 138
  27. 207
  28. 170
  29. 244
  30. 115
  31. 186
  32. 173
  33. 196
  34. 263
  35. 205
  36. 240
  37. 185
  38. 152
  39. 154
  40. 110

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