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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 522 · 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. 1.13 + 30 + 17 + 35 =
  2. 2.18 + 18 + 17 + 45 =
  3. 3.48 + 34 + 20 + 28 =
  4. 4.61 + 20 + 87 + 62 =
  5. 5.88 + 79 + 79 + 33 =
  6. 6.71 + 26 + 15 + 13 =
  7. 7.63 + 68 + 21 + 31 =
  8. 8.65 + 72 + 33 + 81 =
  9. 9.71 + 80 + 26 + 69 =
  10. 10.85 + 77 + 61 + 85 =
  11. 11.86 + 46 + 74 + 15 =
  12. 12.58 + 49 + 52 + 61 =
  13. 13.34 + 83 + 41 + 30 =
  14. 14.81 + 41 + 79 + 29 =
  15. 15.23 + 12 + 12 + 76 =
  16. 16.76 + 25 + 63 + 24 =
  17. 17.82 + 16 + 78 + 67 =
  18. 18.31 + 50 + 61 + 53 =
  19. 19.27 + 89 + 47 + 47 =
  20. 20.14 + 33 + 75 + 26 =
  21. 21.33 + 30 + 72 + 73 =
  22. 22.16 + 36 + 39 + 42 =
  23. 23.12 + 70 + 75 + 31 =
  24. 24.82 + 80 + 17 + 57 =
  25. 25.59 + 41 + 13 + 44 =
  26. 26.18 + 57 + 58 + 89 =
  27. 27.16 + 51 + 57 + 12 =
  28. 28.76 + 71 + 54 + 46 =
  29. 29.50 + 48 + 15 + 15 =
  30. 30.46 + 17 + 15 + 43 =
  31. 31.35 + 38 + 14 + 17 =
  32. 32.89 + 57 + 17 + 68 =
  33. 33.64 + 83 + 48 + 55 =
  34. 34.37 + 57 + 24 + 20 =
  35. 35.39 + 41 + 76 + 73 =
  36. 36.18 + 58 + 84 + 47 =
  37. 37.24 + 15 + 21 + 51 =
  38. 38.56 + 13 + 35 + 82 =
  39. 39.69 + 73 + 30 + 74 =
  40. 40.26 + 75 + 12 + 84 =

Answer key

  1. 95
  2. 98
  3. 130
  4. 230
  5. 279
  6. 125
  7. 183
  8. 251
  9. 246
  10. 308
  11. 221
  12. 220
  13. 188
  14. 230
  15. 123
  16. 188
  17. 243
  18. 195
  19. 210
  20. 148
  21. 208
  22. 133
  23. 188
  24. 236
  25. 157
  26. 222
  27. 136
  28. 247
  29. 128
  30. 121
  31. 104
  32. 231
  33. 250
  34. 138
  35. 229
  36. 207
  37. 111
  38. 186
  39. 246
  40. 197

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