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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 999 · 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. 1.30 + 66 + 28 + 74 =
  2. 2.55 + 26 + 70 + 88 =
  3. 3.26 + 13 + 20 + 56 =
  4. 4.86 + 45 + 40 + 19 =
  5. 5.86 + 75 + 73 + 56 =
  6. 6.31 + 26 + 60 + 63 =
  7. 7.14 + 16 + 23 + 36 =
  8. 8.69 + 53 + 68 + 11 =
  9. 9.71 + 17 + 51 + 40 =
  10. 10.21 + 60 + 18 + 15 =
  11. 11.86 + 15 + 28 + 47 =
  12. 12.43 + 76 + 71 + 30 =
  13. 13.71 + 26 + 19 + 84 =
  14. 14.25 + 85 + 28 + 60 =
  15. 15.12 + 76 + 89 + 71 =
  16. 16.70 + 58 + 50 + 68 =
  17. 17.11 + 44 + 59 + 65 =
  18. 18.49 + 46 + 55 + 16 =
  19. 19.56 + 78 + 27 + 77 =
  20. 20.68 + 25 + 30 + 85 =
  21. 21.87 + 36 + 69 + 15 =
  22. 22.81 + 40 + 61 + 48 =
  23. 23.68 + 65 + 52 + 16 =
  24. 24.84 + 25 + 72 + 74 =
  25. 25.81 + 15 + 64 + 36 =
  26. 26.71 + 14 + 39 + 55 =
  27. 27.44 + 64 + 71 + 52 =
  28. 28.65 + 50 + 68 + 47 =
  29. 29.29 + 83 + 23 + 12 =
  30. 30.65 + 18 + 60 + 68 =
  31. 31.35 + 40 + 24 + 79 =
  32. 32.33 + 18 + 12 + 46 =
  33. 33.31 + 72 + 89 + 65 =
  34. 34.43 + 60 + 47 + 45 =
  35. 35.11 + 83 + 33 + 33 =
  36. 36.45 + 23 + 57 + 22 =
  37. 37.31 + 25 + 68 + 35 =
  38. 38.24 + 26 + 37 + 77 =
  39. 39.28 + 55 + 41 + 78 =
  40. 40.71 + 19 + 69 + 43 =

Answer key

  1. 198
  2. 239
  3. 115
  4. 190
  5. 290
  6. 180
  7. 89
  8. 201
  9. 179
  10. 114
  11. 176
  12. 220
  13. 200
  14. 198
  15. 248
  16. 246
  17. 179
  18. 166
  19. 238
  20. 208
  21. 207
  22. 230
  23. 201
  24. 255
  25. 196
  26. 179
  27. 231
  28. 230
  29. 147
  30. 211
  31. 178
  32. 109
  33. 257
  34. 195
  35. 160
  36. 147
  37. 159
  38. 164
  39. 202
  40. 202

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