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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 24 · 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. 1.19 + 77 + 80 + 60 =
  2. 2.68 + 11 + 22 + 48 =
  3. 3.13 + 72 + 42 + 32 =
  4. 4.49 + 83 + 55 + 15 =
  5. 5.71 + 82 + 13 + 35 =
  6. 6.15 + 72 + 61 + 56 =
  7. 7.58 + 50 + 11 + 34 =
  8. 8.35 + 42 + 85 + 51 =
  9. 9.18 + 49 + 72 + 33 =
  10. 10.77 + 37 + 82 + 70 =
  11. 11.43 + 51 + 68 + 72 =
  12. 12.13 + 24 + 85 + 54 =
  13. 13.32 + 59 + 33 + 41 =
  14. 14.20 + 52 + 60 + 60 =
  15. 15.72 + 39 + 33 + 84 =
  16. 16.77 + 65 + 84 + 67 =
  17. 17.13 + 36 + 52 + 26 =
  18. 18.26 + 85 + 12 + 29 =
  19. 19.84 + 70 + 32 + 25 =
  20. 20.12 + 23 + 26 + 73 =
  21. 21.14 + 31 + 11 + 52 =
  22. 22.56 + 75 + 32 + 53 =
  23. 23.11 + 52 + 83 + 56 =
  24. 24.68 + 23 + 46 + 89 =
  25. 25.39 + 69 + 53 + 79 =
  26. 26.25 + 77 + 17 + 16 =
  27. 27.57 + 89 + 15 + 59 =
  28. 28.84 + 16 + 69 + 77 =
  29. 29.74 + 84 + 16 + 52 =
  30. 30.80 + 35 + 71 + 56 =
  31. 31.81 + 32 + 75 + 39 =
  32. 32.79 + 16 + 22 + 24 =
  33. 33.74 + 54 + 53 + 81 =
  34. 34.61 + 59 + 82 + 41 =
  35. 35.62 + 58 + 62 + 85 =
  36. 36.13 + 49 + 60 + 33 =
  37. 37.25 + 17 + 67 + 15 =
  38. 38.53 + 71 + 70 + 65 =
  39. 39.86 + 73 + 24 + 19 =
  40. 40.42 + 32 + 69 + 15 =

Answer key

  1. 236
  2. 149
  3. 159
  4. 202
  5. 201
  6. 204
  7. 153
  8. 213
  9. 172
  10. 266
  11. 234
  12. 176
  13. 165
  14. 192
  15. 228
  16. 293
  17. 127
  18. 152
  19. 211
  20. 134
  21. 108
  22. 216
  23. 202
  24. 226
  25. 240
  26. 135
  27. 220
  28. 246
  29. 226
  30. 242
  31. 227
  32. 141
  33. 262
  34. 243
  35. 267
  36. 155
  37. 124
  38. 259
  39. 202
  40. 158

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