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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 899 · 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. 1.49 + 52 + 13 + 40 =
  2. 2.49 + 44 + 74 + 72 =
  3. 3.24 + 58 + 31 + 18 =
  4. 4.75 + 14 + 63 + 19 =
  5. 5.63 + 63 + 62 + 72 =
  6. 6.67 + 28 + 86 + 56 =
  7. 7.66 + 83 + 42 + 30 =
  8. 8.71 + 30 + 64 + 45 =
  9. 9.38 + 85 + 57 + 43 =
  10. 10.36 + 81 + 16 + 45 =
  11. 11.49 + 50 + 77 + 88 =
  12. 12.74 + 45 + 21 + 60 =
  13. 13.77 + 25 + 40 + 27 =
  14. 14.24 + 66 + 68 + 50 =
  15. 15.11 + 13 + 27 + 45 =
  16. 16.44 + 20 + 80 + 48 =
  17. 17.21 + 26 + 81 + 16 =
  18. 18.86 + 31 + 50 + 72 =
  19. 19.68 + 40 + 59 + 53 =
  20. 20.27 + 36 + 73 + 73 =
  21. 21.80 + 15 + 89 + 77 =
  22. 22.32 + 37 + 39 + 44 =
  23. 23.58 + 33 + 68 + 58 =
  24. 24.77 + 40 + 67 + 69 =
  25. 25.82 + 17 + 57 + 59 =
  26. 26.75 + 18 + 34 + 42 =
  27. 27.83 + 11 + 16 + 18 =
  28. 28.22 + 51 + 38 + 24 =
  29. 29.58 + 67 + 31 + 13 =
  30. 30.23 + 42 + 44 + 20 =
  31. 31.38 + 34 + 55 + 54 =
  32. 32.18 + 38 + 48 + 28 =
  33. 33.85 + 74 + 69 + 25 =
  34. 34.20 + 58 + 61 + 29 =
  35. 35.65 + 39 + 83 + 73 =
  36. 36.44 + 44 + 75 + 79 =
  37. 37.23 + 37 + 51 + 36 =
  38. 38.37 + 20 + 68 + 16 =
  39. 39.59 + 67 + 73 + 22 =
  40. 40.51 + 26 + 24 + 86 =

Answer key

  1. 154
  2. 239
  3. 131
  4. 171
  5. 260
  6. 237
  7. 221
  8. 210
  9. 223
  10. 178
  11. 264
  12. 200
  13. 169
  14. 208
  15. 96
  16. 192
  17. 144
  18. 239
  19. 220
  20. 209
  21. 261
  22. 152
  23. 217
  24. 253
  25. 215
  26. 169
  27. 128
  28. 135
  29. 169
  30. 129
  31. 181
  32. 132
  33. 253
  34. 168
  35. 260
  36. 242
  37. 147
  38. 141
  39. 221
  40. 187

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