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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 840 · 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. 1.15 + 36 + 89 + 76 =
  2. 2.35 + 55 + 20 + 60 =
  3. 3.36 + 26 + 17 + 51 =
  4. 4.48 + 87 + 11 + 88 =
  5. 5.62 + 50 + 51 + 87 =
  6. 6.50 + 80 + 75 + 12 =
  7. 7.38 + 75 + 69 + 74 =
  8. 8.52 + 72 + 69 + 89 =
  9. 9.33 + 24 + 32 + 85 =
  10. 10.49 + 50 + 47 + 38 =
  11. 11.23 + 61 + 89 + 84 =
  12. 12.75 + 42 + 30 + 24 =
  13. 13.62 + 65 + 58 + 17 =
  14. 14.78 + 64 + 86 + 51 =
  15. 15.62 + 83 + 26 + 33 =
  16. 16.21 + 72 + 13 + 31 =
  17. 17.50 + 32 + 16 + 46 =
  18. 18.13 + 35 + 37 + 61 =
  19. 19.63 + 60 + 63 + 66 =
  20. 20.77 + 54 + 17 + 25 =
  21. 21.33 + 34 + 29 + 70 =
  22. 22.85 + 47 + 41 + 55 =
  23. 23.30 + 50 + 31 + 24 =
  24. 24.20 + 28 + 81 + 24 =
  25. 25.59 + 81 + 80 + 89 =
  26. 26.11 + 68 + 23 + 22 =
  27. 27.40 + 40 + 33 + 34 =
  28. 28.13 + 43 + 83 + 58 =
  29. 29.76 + 18 + 89 + 13 =
  30. 30.18 + 21 + 49 + 57 =
  31. 31.51 + 61 + 31 + 47 =
  32. 32.19 + 58 + 32 + 29 =
  33. 33.28 + 77 + 69 + 47 =
  34. 34.73 + 49 + 83 + 85 =
  35. 35.44 + 20 + 29 + 16 =
  36. 36.73 + 61 + 49 + 54 =
  37. 37.43 + 82 + 86 + 11 =
  38. 38.61 + 56 + 36 + 62 =
  39. 39.19 + 14 + 20 + 81 =
  40. 40.19 + 17 + 33 + 19 =

Answer key

  1. 216
  2. 170
  3. 130
  4. 234
  5. 250
  6. 217
  7. 256
  8. 282
  9. 174
  10. 184
  11. 257
  12. 171
  13. 202
  14. 279
  15. 204
  16. 137
  17. 144
  18. 146
  19. 252
  20. 173
  21. 166
  22. 228
  23. 135
  24. 153
  25. 309
  26. 124
  27. 147
  28. 197
  29. 196
  30. 145
  31. 190
  32. 138
  33. 221
  34. 290
  35. 109
  36. 237
  37. 222
  38. 215
  39. 134
  40. 88

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