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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 856 · 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. 1.21 + 44 + 30 + 81 =
  2. 2.22 + 62 + 80 + 80 =
  3. 3.49 + 88 + 30 + 88 =
  4. 4.11 + 17 + 21 + 39 =
  5. 5.86 + 48 + 77 + 14 =
  6. 6.21 + 64 + 13 + 80 =
  7. 7.49 + 14 + 66 + 56 =
  8. 8.76 + 32 + 70 + 58 =
  9. 9.44 + 35 + 53 + 12 =
  10. 10.75 + 28 + 30 + 47 =
  11. 11.42 + 58 + 45 + 65 =
  12. 12.80 + 30 + 19 + 43 =
  13. 13.85 + 13 + 47 + 79 =
  14. 14.41 + 60 + 42 + 68 =
  15. 15.15 + 24 + 59 + 21 =
  16. 16.51 + 88 + 43 + 89 =
  17. 17.32 + 60 + 53 + 33 =
  18. 18.39 + 33 + 36 + 45 =
  19. 19.49 + 11 + 54 + 25 =
  20. 20.34 + 65 + 21 + 18 =
  21. 21.62 + 60 + 75 + 29 =
  22. 22.32 + 65 + 88 + 82 =
  23. 23.89 + 57 + 49 + 59 =
  24. 24.35 + 21 + 53 + 80 =
  25. 25.11 + 33 + 38 + 48 =
  26. 26.24 + 61 + 64 + 36 =
  27. 27.16 + 11 + 21 + 61 =
  28. 28.81 + 20 + 80 + 75 =
  29. 29.25 + 62 + 29 + 82 =
  30. 30.19 + 80 + 48 + 69 =
  31. 31.26 + 67 + 36 + 85 =
  32. 32.50 + 60 + 35 + 59 =
  33. 33.22 + 29 + 81 + 14 =
  34. 34.52 + 56 + 28 + 36 =
  35. 35.43 + 85 + 41 + 63 =
  36. 36.53 + 39 + 65 + 67 =
  37. 37.17 + 61 + 34 + 88 =
  38. 38.36 + 86 + 26 + 57 =
  39. 39.63 + 35 + 57 + 76 =
  40. 40.75 + 75 + 29 + 23 =

Answer key

  1. 176
  2. 244
  3. 255
  4. 88
  5. 225
  6. 178
  7. 185
  8. 236
  9. 144
  10. 180
  11. 210
  12. 172
  13. 224
  14. 211
  15. 119
  16. 271
  17. 178
  18. 153
  19. 139
  20. 138
  21. 226
  22. 267
  23. 254
  24. 189
  25. 130
  26. 185
  27. 109
  28. 256
  29. 198
  30. 216
  31. 214
  32. 204
  33. 146
  34. 172
  35. 232
  36. 224
  37. 200
  38. 205
  39. 231
  40. 202

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