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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 800 · 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. 1.73 + 30 + 75 + 87 =
  2. 2.47 + 61 + 47 + 54 =
  3. 3.18 + 34 + 62 + 27 =
  4. 4.24 + 33 + 24 + 25 =
  5. 5.43 + 68 + 82 + 21 =
  6. 6.46 + 67 + 27 + 57 =
  7. 7.81 + 20 + 40 + 28 =
  8. 8.11 + 72 + 48 + 28 =
  9. 9.17 + 12 + 13 + 53 =
  10. 10.44 + 32 + 87 + 14 =
  11. 11.34 + 73 + 47 + 46 =
  12. 12.20 + 27 + 36 + 76 =
  13. 13.70 + 26 + 33 + 35 =
  14. 14.80 + 68 + 43 + 27 =
  15. 15.58 + 21 + 47 + 61 =
  16. 16.27 + 73 + 83 + 47 =
  17. 17.53 + 67 + 68 + 58 =
  18. 18.82 + 36 + 21 + 73 =
  19. 19.63 + 11 + 15 + 82 =
  20. 20.33 + 79 + 39 + 35 =
  21. 21.49 + 28 + 57 + 33 =
  22. 22.36 + 52 + 34 + 53 =
  23. 23.75 + 39 + 72 + 17 =
  24. 24.18 + 88 + 88 + 76 =
  25. 25.69 + 72 + 17 + 82 =
  26. 26.81 + 43 + 19 + 31 =
  27. 27.52 + 60 + 13 + 62 =
  28. 28.82 + 66 + 19 + 74 =
  29. 29.77 + 43 + 38 + 44 =
  30. 30.49 + 36 + 11 + 25 =
  31. 31.48 + 81 + 80 + 85 =
  32. 32.16 + 20 + 55 + 14 =
  33. 33.82 + 23 + 82 + 23 =
  34. 34.70 + 53 + 50 + 79 =
  35. 35.88 + 74 + 37 + 25 =
  36. 36.55 + 23 + 89 + 28 =
  37. 37.67 + 56 + 89 + 35 =
  38. 38.77 + 49 + 27 + 58 =
  39. 39.75 + 21 + 72 + 28 =
  40. 40.39 + 42 + 41 + 37 =

Answer key

  1. 265
  2. 209
  3. 141
  4. 106
  5. 214
  6. 197
  7. 169
  8. 159
  9. 95
  10. 177
  11. 200
  12. 159
  13. 164
  14. 218
  15. 187
  16. 230
  17. 246
  18. 212
  19. 171
  20. 186
  21. 167
  22. 175
  23. 203
  24. 270
  25. 240
  26. 174
  27. 187
  28. 241
  29. 202
  30. 121
  31. 294
  32. 105
  33. 210
  34. 252
  35. 224
  36. 195
  37. 247
  38. 211
  39. 196
  40. 159

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