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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 293 · 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. 1.53 + 71 + 70 + 16 =
  2. 2.17 + 79 + 21 + 84 =
  3. 3.14 + 22 + 33 + 78 =
  4. 4.68 + 81 + 65 + 52 =
  5. 5.72 + 23 + 25 + 17 =
  6. 6.35 + 37 + 26 + 68 =
  7. 7.72 + 19 + 40 + 33 =
  8. 8.25 + 76 + 17 + 29 =
  9. 9.22 + 79 + 63 + 23 =
  10. 10.19 + 32 + 49 + 40 =
  11. 11.55 + 75 + 67 + 44 =
  12. 12.79 + 81 + 86 + 78 =
  13. 13.73 + 67 + 32 + 56 =
  14. 14.83 + 24 + 12 + 65 =
  15. 15.64 + 28 + 22 + 74 =
  16. 16.27 + 50 + 11 + 22 =
  17. 17.31 + 19 + 32 + 35 =
  18. 18.25 + 32 + 16 + 37 =
  19. 19.42 + 69 + 28 + 32 =
  20. 20.54 + 52 + 73 + 75 =
  21. 21.41 + 79 + 18 + 54 =
  22. 22.13 + 66 + 88 + 37 =
  23. 23.55 + 29 + 49 + 51 =
  24. 24.80 + 54 + 21 + 53 =
  25. 25.38 + 71 + 47 + 18 =
  26. 26.53 + 73 + 21 + 22 =
  27. 27.44 + 57 + 15 + 27 =
  28. 28.65 + 60 + 88 + 60 =
  29. 29.37 + 20 + 16 + 61 =
  30. 30.74 + 73 + 49 + 31 =
  31. 31.58 + 77 + 47 + 41 =
  32. 32.47 + 19 + 82 + 69 =
  33. 33.67 + 21 + 41 + 15 =
  34. 34.83 + 57 + 24 + 37 =
  35. 35.40 + 73 + 13 + 61 =
  36. 36.26 + 23 + 20 + 12 =
  37. 37.29 + 41 + 79 + 70 =
  38. 38.55 + 15 + 49 + 89 =
  39. 39.55 + 73 + 53 + 89 =
  40. 40.64 + 20 + 15 + 88 =

Answer key

  1. 210
  2. 201
  3. 147
  4. 266
  5. 137
  6. 166
  7. 164
  8. 147
  9. 187
  10. 140
  11. 241
  12. 324
  13. 228
  14. 184
  15. 188
  16. 110
  17. 117
  18. 110
  19. 171
  20. 254
  21. 192
  22. 204
  23. 184
  24. 208
  25. 174
  26. 169
  27. 143
  28. 273
  29. 134
  30. 227
  31. 223
  32. 217
  33. 144
  34. 201
  35. 187
  36. 81
  37. 219
  38. 208
  39. 270
  40. 187

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