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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 481 · 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. 1.37 + 36 + 30 + 13 =
  2. 2.51 + 23 + 67 + 75 =
  3. 3.60 + 34 + 38 + 18 =
  4. 4.48 + 61 + 67 + 62 =
  5. 5.72 + 15 + 81 + 53 =
  6. 6.71 + 61 + 60 + 62 =
  7. 7.32 + 52 + 81 + 44 =
  8. 8.36 + 34 + 47 + 39 =
  9. 9.84 + 20 + 41 + 71 =
  10. 10.73 + 87 + 32 + 58 =
  11. 11.87 + 18 + 18 + 18 =
  12. 12.50 + 20 + 43 + 29 =
  13. 13.52 + 88 + 57 + 16 =
  14. 14.45 + 71 + 81 + 80 =
  15. 15.29 + 23 + 14 + 87 =
  16. 16.86 + 19 + 88 + 36 =
  17. 17.64 + 57 + 43 + 62 =
  18. 18.65 + 50 + 84 + 83 =
  19. 19.67 + 43 + 36 + 52 =
  20. 20.18 + 89 + 27 + 53 =
  21. 21.61 + 49 + 64 + 63 =
  22. 22.77 + 54 + 39 + 62 =
  23. 23.41 + 22 + 33 + 61 =
  24. 24.56 + 58 + 79 + 44 =
  25. 25.75 + 56 + 44 + 44 =
  26. 26.19 + 54 + 27 + 49 =
  27. 27.80 + 82 + 25 + 32 =
  28. 28.83 + 38 + 87 + 52 =
  29. 29.14 + 41 + 66 + 63 =
  30. 30.56 + 56 + 39 + 20 =
  31. 31.15 + 70 + 25 + 17 =
  32. 32.30 + 86 + 33 + 35 =
  33. 33.26 + 39 + 53 + 32 =
  34. 34.52 + 26 + 18 + 19 =
  35. 35.54 + 21 + 32 + 26 =
  36. 36.56 + 14 + 69 + 70 =
  37. 37.86 + 81 + 72 + 41 =
  38. 38.60 + 79 + 46 + 30 =
  39. 39.19 + 72 + 14 + 41 =
  40. 40.74 + 26 + 42 + 28 =

Answer key

  1. 116
  2. 216
  3. 150
  4. 238
  5. 221
  6. 254
  7. 209
  8. 156
  9. 216
  10. 250
  11. 141
  12. 142
  13. 213
  14. 277
  15. 153
  16. 229
  17. 226
  18. 282
  19. 198
  20. 187
  21. 237
  22. 232
  23. 157
  24. 237
  25. 219
  26. 149
  27. 219
  28. 260
  29. 184
  30. 171
  31. 127
  32. 184
  33. 150
  34. 115
  35. 133
  36. 209
  37. 280
  38. 215
  39. 146
  40. 170

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