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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 112 · 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 + 52 + 34 + 31 =
  2. 2.79 + 20 + 77 + 54 =
  3. 3.31 + 88 + 78 + 20 =
  4. 4.16 + 18 + 54 + 61 =
  5. 5.25 + 39 + 63 + 33 =
  6. 6.63 + 19 + 47 + 35 =
  7. 7.16 + 14 + 48 + 50 =
  8. 8.13 + 61 + 11 + 68 =
  9. 9.62 + 39 + 84 + 55 =
  10. 10.36 + 70 + 48 + 37 =
  11. 11.25 + 27 + 29 + 69 =
  12. 12.82 + 25 + 77 + 35 =
  13. 13.28 + 53 + 47 + 44 =
  14. 14.37 + 34 + 14 + 83 =
  15. 15.63 + 71 + 14 + 63 =
  16. 16.39 + 20 + 25 + 63 =
  17. 17.78 + 61 + 26 + 52 =
  18. 18.15 + 26 + 15 + 86 =
  19. 19.51 + 72 + 20 + 37 =
  20. 20.21 + 34 + 12 + 22 =
  21. 21.18 + 18 + 54 + 81 =
  22. 22.33 + 18 + 54 + 64 =
  23. 23.18 + 52 + 75 + 47 =
  24. 24.13 + 60 + 65 + 44 =
  25. 25.89 + 66 + 77 + 16 =
  26. 26.88 + 44 + 69 + 80 =
  27. 27.24 + 66 + 16 + 64 =
  28. 28.24 + 58 + 25 + 60 =
  29. 29.84 + 66 + 56 + 69 =
  30. 30.37 + 50 + 35 + 78 =
  31. 31.69 + 46 + 12 + 17 =
  32. 32.66 + 41 + 18 + 38 =
  33. 33.19 + 48 + 68 + 89 =
  34. 34.22 + 61 + 48 + 27 =
  35. 35.31 + 45 + 13 + 46 =
  36. 36.55 + 15 + 43 + 22 =
  37. 37.41 + 12 + 32 + 28 =
  38. 38.50 + 74 + 34 + 45 =
  39. 39.80 + 20 + 62 + 25 =
  40. 40.68 + 25 + 76 + 52 =

Answer key

  1. 170
  2. 230
  3. 217
  4. 149
  5. 160
  6. 164
  7. 128
  8. 153
  9. 240
  10. 191
  11. 150
  12. 219
  13. 172
  14. 168
  15. 211
  16. 147
  17. 217
  18. 142
  19. 180
  20. 89
  21. 171
  22. 169
  23. 192
  24. 182
  25. 248
  26. 281
  27. 170
  28. 167
  29. 275
  30. 200
  31. 144
  32. 163
  33. 224
  34. 158
  35. 135
  36. 135
  37. 113
  38. 203
  39. 187
  40. 221

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