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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 976 · 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. 1.34 + 80 + 78 + 40 =
  2. 2.36 + 33 + 46 + 58 =
  3. 3.88 + 21 + 84 + 26 =
  4. 4.24 + 24 + 16 + 88 =
  5. 5.21 + 53 + 15 + 69 =
  6. 6.72 + 17 + 16 + 82 =
  7. 7.53 + 79 + 19 + 35 =
  8. 8.55 + 41 + 29 + 33 =
  9. 9.41 + 89 + 31 + 42 =
  10. 10.83 + 48 + 87 + 43 =
  11. 11.23 + 16 + 68 + 59 =
  12. 12.62 + 50 + 76 + 51 =
  13. 13.85 + 87 + 49 + 61 =
  14. 14.30 + 51 + 27 + 71 =
  15. 15.29 + 84 + 15 + 86 =
  16. 16.20 + 42 + 48 + 60 =
  17. 17.11 + 23 + 81 + 34 =
  18. 18.24 + 28 + 76 + 76 =
  19. 19.71 + 39 + 64 + 33 =
  20. 20.82 + 29 + 69 + 73 =
  21. 21.67 + 12 + 12 + 78 =
  22. 22.24 + 29 + 55 + 16 =
  23. 23.20 + 85 + 46 + 35 =
  24. 24.45 + 63 + 68 + 41 =
  25. 25.35 + 66 + 23 + 77 =
  26. 26.39 + 71 + 41 + 67 =
  27. 27.64 + 76 + 15 + 74 =
  28. 28.72 + 25 + 53 + 51 =
  29. 29.19 + 11 + 74 + 30 =
  30. 30.73 + 81 + 69 + 20 =
  31. 31.13 + 81 + 79 + 33 =
  32. 32.89 + 32 + 42 + 48 =
  33. 33.54 + 32 + 31 + 30 =
  34. 34.65 + 14 + 79 + 54 =
  35. 35.59 + 56 + 75 + 29 =
  36. 36.60 + 65 + 33 + 11 =
  37. 37.87 + 30 + 11 + 37 =
  38. 38.85 + 20 + 22 + 81 =
  39. 39.86 + 15 + 13 + 22 =
  40. 40.68 + 45 + 28 + 76 =

Answer key

  1. 232
  2. 173
  3. 219
  4. 152
  5. 158
  6. 187
  7. 186
  8. 158
  9. 203
  10. 261
  11. 166
  12. 239
  13. 282
  14. 179
  15. 214
  16. 170
  17. 149
  18. 204
  19. 207
  20. 253
  21. 169
  22. 124
  23. 186
  24. 217
  25. 201
  26. 218
  27. 229
  28. 201
  29. 134
  30. 243
  31. 206
  32. 211
  33. 147
  34. 212
  35. 219
  36. 169
  37. 165
  38. 208
  39. 136
  40. 217

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