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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 273 · 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. 1.38 + 28 + 63 + 43 =
  2. 2.65 + 44 + 73 + 17 =
  3. 3.15 + 25 + 17 + 32 =
  4. 4.81 + 41 + 16 + 66 =
  5. 5.15 + 48 + 70 + 30 =
  6. 6.36 + 40 + 41 + 89 =
  7. 7.37 + 21 + 20 + 22 =
  8. 8.19 + 75 + 13 + 79 =
  9. 9.86 + 88 + 62 + 76 =
  10. 10.85 + 59 + 83 + 30 =
  11. 11.87 + 12 + 59 + 60 =
  12. 12.61 + 13 + 58 + 79 =
  13. 13.24 + 47 + 15 + 19 =
  14. 14.21 + 72 + 83 + 25 =
  15. 15.53 + 29 + 16 + 78 =
  16. 16.83 + 64 + 68 + 13 =
  17. 17.77 + 63 + 70 + 18 =
  18. 18.29 + 65 + 15 + 59 =
  19. 19.34 + 29 + 29 + 55 =
  20. 20.18 + 24 + 89 + 34 =
  21. 21.71 + 77 + 49 + 62 =
  22. 22.14 + 41 + 61 + 59 =
  23. 23.66 + 85 + 73 + 86 =
  24. 24.26 + 78 + 53 + 13 =
  25. 25.46 + 42 + 82 + 83 =
  26. 26.55 + 12 + 49 + 26 =
  27. 27.51 + 89 + 13 + 28 =
  28. 28.60 + 73 + 67 + 72 =
  29. 29.36 + 37 + 37 + 43 =
  30. 30.27 + 36 + 77 + 27 =
  31. 31.24 + 52 + 81 + 13 =
  32. 32.40 + 84 + 12 + 28 =
  33. 33.88 + 35 + 40 + 60 =
  34. 34.25 + 48 + 87 + 51 =
  35. 35.17 + 76 + 18 + 41 =
  36. 36.20 + 39 + 87 + 43 =
  37. 37.52 + 25 + 50 + 27 =
  38. 38.60 + 54 + 20 + 36 =
  39. 39.81 + 26 + 74 + 44 =
  40. 40.16 + 20 + 56 + 76 =

Answer key

  1. 172
  2. 199
  3. 89
  4. 204
  5. 163
  6. 206
  7. 100
  8. 186
  9. 312
  10. 257
  11. 218
  12. 211
  13. 105
  14. 201
  15. 176
  16. 228
  17. 228
  18. 168
  19. 147
  20. 165
  21. 259
  22. 175
  23. 310
  24. 170
  25. 253
  26. 142
  27. 181
  28. 272
  29. 153
  30. 167
  31. 170
  32. 164
  33. 223
  34. 211
  35. 152
  36. 189
  37. 154
  38. 170
  39. 225
  40. 168

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