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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 463 · 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. 1.11 + 46 + 74 + 76 =
  2. 2.83 + 78 + 13 + 80 =
  3. 3.67 + 21 + 17 + 44 =
  4. 4.12 + 82 + 37 + 61 =
  5. 5.76 + 85 + 47 + 58 =
  6. 6.84 + 36 + 13 + 52 =
  7. 7.22 + 60 + 78 + 75 =
  8. 8.34 + 63 + 45 + 47 =
  9. 9.49 + 86 + 43 + 74 =
  10. 10.67 + 82 + 47 + 16 =
  11. 11.88 + 50 + 31 + 14 =
  12. 12.62 + 43 + 24 + 39 =
  13. 13.61 + 76 + 20 + 29 =
  14. 14.60 + 33 + 54 + 21 =
  15. 15.49 + 32 + 28 + 36 =
  16. 16.33 + 84 + 57 + 35 =
  17. 17.24 + 84 + 57 + 15 =
  18. 18.16 + 60 + 22 + 18 =
  19. 19.30 + 75 + 19 + 59 =
  20. 20.17 + 41 + 30 + 82 =
  21. 21.26 + 84 + 66 + 80 =
  22. 22.26 + 62 + 52 + 68 =
  23. 23.85 + 65 + 41 + 59 =
  24. 24.58 + 24 + 42 + 17 =
  25. 25.17 + 36 + 23 + 75 =
  26. 26.15 + 37 + 54 + 34 =
  27. 27.16 + 21 + 14 + 55 =
  28. 28.72 + 13 + 65 + 77 =
  29. 29.13 + 83 + 77 + 32 =
  30. 30.81 + 80 + 45 + 78 =
  31. 31.66 + 15 + 33 + 39 =
  32. 32.12 + 62 + 14 + 51 =
  33. 33.16 + 56 + 86 + 71 =
  34. 34.11 + 61 + 16 + 56 =
  35. 35.64 + 13 + 62 + 16 =
  36. 36.43 + 78 + 14 + 33 =
  37. 37.60 + 73 + 32 + 35 =
  38. 38.26 + 57 + 31 + 25 =
  39. 39.42 + 70 + 74 + 26 =
  40. 40.68 + 33 + 28 + 79 =

Answer key

  1. 207
  2. 254
  3. 149
  4. 192
  5. 266
  6. 185
  7. 235
  8. 189
  9. 252
  10. 212
  11. 183
  12. 168
  13. 186
  14. 168
  15. 145
  16. 209
  17. 180
  18. 116
  19. 183
  20. 170
  21. 256
  22. 208
  23. 250
  24. 141
  25. 151
  26. 140
  27. 106
  28. 227
  29. 205
  30. 284
  31. 153
  32. 139
  33. 229
  34. 144
  35. 155
  36. 168
  37. 200
  38. 139
  39. 212
  40. 208

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