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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 879 · 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. 1.18 + 28 + 13 + 73 =
  2. 2.12 + 34 + 76 + 78 =
  3. 3.30 + 14 + 53 + 11 =
  4. 4.12 + 71 + 55 + 39 =
  5. 5.74 + 25 + 21 + 68 =
  6. 6.42 + 16 + 16 + 53 =
  7. 7.54 + 42 + 22 + 82 =
  8. 8.40 + 18 + 81 + 34 =
  9. 9.17 + 81 + 84 + 32 =
  10. 10.65 + 38 + 24 + 31 =
  11. 11.32 + 89 + 55 + 33 =
  12. 12.30 + 23 + 15 + 19 =
  13. 13.37 + 20 + 71 + 60 =
  14. 14.23 + 26 + 77 + 73 =
  15. 15.64 + 89 + 57 + 45 =
  16. 16.50 + 67 + 25 + 30 =
  17. 17.71 + 40 + 54 + 63 =
  18. 18.12 + 18 + 36 + 64 =
  19. 19.15 + 49 + 27 + 78 =
  20. 20.60 + 87 + 53 + 28 =
  21. 21.70 + 34 + 14 + 81 =
  22. 22.20 + 80 + 69 + 29 =
  23. 23.23 + 14 + 64 + 43 =
  24. 24.25 + 58 + 87 + 50 =
  25. 25.77 + 84 + 21 + 20 =
  26. 26.41 + 40 + 25 + 39 =
  27. 27.21 + 25 + 14 + 14 =
  28. 28.88 + 50 + 39 + 22 =
  29. 29.37 + 17 + 84 + 53 =
  30. 30.30 + 16 + 17 + 32 =
  31. 31.78 + 51 + 88 + 12 =
  32. 32.34 + 39 + 47 + 65 =
  33. 33.26 + 83 + 58 + 64 =
  34. 34.22 + 78 + 85 + 27 =
  35. 35.12 + 55 + 64 + 22 =
  36. 36.63 + 22 + 21 + 78 =
  37. 37.53 + 80 + 75 + 51 =
  38. 38.51 + 18 + 75 + 81 =
  39. 39.43 + 23 + 65 + 28 =
  40. 40.86 + 28 + 36 + 31 =

Answer key

  1. 132
  2. 200
  3. 108
  4. 177
  5. 188
  6. 127
  7. 200
  8. 173
  9. 214
  10. 158
  11. 209
  12. 87
  13. 188
  14. 199
  15. 255
  16. 172
  17. 228
  18. 130
  19. 169
  20. 228
  21. 199
  22. 198
  23. 144
  24. 220
  25. 202
  26. 145
  27. 74
  28. 199
  29. 191
  30. 95
  31. 229
  32. 185
  33. 231
  34. 212
  35. 153
  36. 184
  37. 259
  38. 225
  39. 159
  40. 181

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