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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 561 · 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. 1.79 + 78 + 75 + 75 =
  2. 2.29 + 61 + 35 + 58 =
  3. 3.38 + 14 + 13 + 25 =
  4. 4.26 + 87 + 88 + 53 =
  5. 5.35 + 49 + 87 + 30 =
  6. 6.71 + 24 + 34 + 14 =
  7. 7.34 + 36 + 82 + 18 =
  8. 8.71 + 41 + 83 + 53 =
  9. 9.71 + 57 + 87 + 31 =
  10. 10.62 + 40 + 72 + 34 =
  11. 11.51 + 36 + 21 + 30 =
  12. 12.63 + 38 + 69 + 12 =
  13. 13.25 + 77 + 27 + 11 =
  14. 14.17 + 30 + 25 + 58 =
  15. 15.72 + 80 + 37 + 66 =
  16. 16.15 + 38 + 68 + 50 =
  17. 17.13 + 57 + 66 + 25 =
  18. 18.13 + 31 + 48 + 83 =
  19. 19.56 + 77 + 76 + 56 =
  20. 20.54 + 20 + 16 + 45 =
  21. 21.15 + 82 + 64 + 43 =
  22. 22.22 + 27 + 14 + 42 =
  23. 23.15 + 14 + 74 + 41 =
  24. 24.87 + 39 + 79 + 80 =
  25. 25.39 + 79 + 54 + 84 =
  26. 26.64 + 43 + 11 + 64 =
  27. 27.52 + 42 + 57 + 69 =
  28. 28.17 + 11 + 79 + 57 =
  29. 29.36 + 59 + 54 + 36 =
  30. 30.68 + 53 + 57 + 61 =
  31. 31.61 + 59 + 55 + 66 =
  32. 32.77 + 46 + 64 + 51 =
  33. 33.63 + 15 + 12 + 32 =
  34. 34.83 + 39 + 17 + 59 =
  35. 35.26 + 32 + 42 + 29 =
  36. 36.53 + 57 + 25 + 22 =
  37. 37.46 + 39 + 63 + 58 =
  38. 38.46 + 64 + 35 + 15 =
  39. 39.44 + 49 + 80 + 64 =
  40. 40.45 + 77 + 61 + 12 =

Answer key

  1. 307
  2. 183
  3. 90
  4. 254
  5. 201
  6. 143
  7. 170
  8. 248
  9. 246
  10. 208
  11. 138
  12. 182
  13. 140
  14. 130
  15. 255
  16. 171
  17. 161
  18. 175
  19. 265
  20. 135
  21. 204
  22. 105
  23. 144
  24. 285
  25. 256
  26. 182
  27. 220
  28. 164
  29. 185
  30. 239
  31. 241
  32. 238
  33. 122
  34. 198
  35. 129
  36. 157
  37. 206
  38. 160
  39. 237
  40. 195

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