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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 881 · 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. 1.35 + 87 + 57 + 41 =
  2. 2.68 + 39 + 21 + 30 =
  3. 3.88 + 15 + 54 + 61 =
  4. 4.48 + 39 + 79 + 60 =
  5. 5.43 + 86 + 73 + 83 =
  6. 6.31 + 64 + 17 + 40 =
  7. 7.75 + 27 + 73 + 80 =
  8. 8.62 + 61 + 21 + 78 =
  9. 9.49 + 59 + 18 + 67 =
  10. 10.73 + 47 + 27 + 77 =
  11. 11.22 + 33 + 61 + 71 =
  12. 12.34 + 37 + 43 + 21 =
  13. 13.49 + 72 + 25 + 83 =
  14. 14.76 + 52 + 32 + 73 =
  15. 15.49 + 85 + 75 + 80 =
  16. 16.33 + 16 + 12 + 89 =
  17. 17.29 + 55 + 63 + 78 =
  18. 18.43 + 59 + 82 + 42 =
  19. 19.72 + 24 + 60 + 38 =
  20. 20.72 + 59 + 65 + 67 =
  21. 21.43 + 69 + 21 + 68 =
  22. 22.13 + 78 + 31 + 56 =
  23. 23.40 + 30 + 63 + 24 =
  24. 24.37 + 80 + 62 + 40 =
  25. 25.39 + 24 + 76 + 47 =
  26. 26.29 + 66 + 64 + 17 =
  27. 27.84 + 74 + 67 + 50 =
  28. 28.84 + 78 + 33 + 18 =
  29. 29.46 + 53 + 34 + 55 =
  30. 30.13 + 33 + 83 + 67 =
  31. 31.40 + 52 + 54 + 81 =
  32. 32.52 + 37 + 73 + 59 =
  33. 33.75 + 72 + 46 + 49 =
  34. 34.55 + 40 + 74 + 44 =
  35. 35.31 + 54 + 71 + 54 =
  36. 36.66 + 30 + 81 + 28 =
  37. 37.14 + 27 + 21 + 34 =
  38. 38.32 + 73 + 65 + 52 =
  39. 39.30 + 18 + 42 + 71 =
  40. 40.30 + 82 + 70 + 75 =

Answer key

  1. 220
  2. 158
  3. 218
  4. 226
  5. 285
  6. 152
  7. 255
  8. 222
  9. 193
  10. 224
  11. 187
  12. 135
  13. 229
  14. 233
  15. 289
  16. 150
  17. 225
  18. 226
  19. 194
  20. 263
  21. 201
  22. 178
  23. 157
  24. 219
  25. 186
  26. 176
  27. 275
  28. 213
  29. 188
  30. 196
  31. 227
  32. 221
  33. 242
  34. 213
  35. 210
  36. 205
  37. 96
  38. 222
  39. 161
  40. 257

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