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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 868 · 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. 1.76 + 37 + 43 + 67 =
  2. 2.61 + 19 + 28 + 77 =
  3. 3.56 + 73 + 58 + 68 =
  4. 4.52 + 43 + 65 + 31 =
  5. 5.25 + 83 + 37 + 48 =
  6. 6.41 + 89 + 11 + 87 =
  7. 7.49 + 88 + 43 + 52 =
  8. 8.67 + 65 + 45 + 21 =
  9. 9.31 + 58 + 68 + 65 =
  10. 10.35 + 19 + 63 + 19 =
  11. 11.68 + 69 + 12 + 39 =
  12. 12.64 + 46 + 21 + 60 =
  13. 13.31 + 55 + 19 + 52 =
  14. 14.20 + 52 + 56 + 13 =
  15. 15.36 + 25 + 76 + 31 =
  16. 16.21 + 49 + 25 + 37 =
  17. 17.13 + 61 + 50 + 28 =
  18. 18.88 + 27 + 48 + 20 =
  19. 19.51 + 32 + 38 + 11 =
  20. 20.51 + 57 + 69 + 76 =
  21. 21.51 + 75 + 19 + 74 =
  22. 22.55 + 49 + 48 + 36 =
  23. 23.20 + 70 + 28 + 82 =
  24. 24.63 + 30 + 68 + 19 =
  25. 25.41 + 21 + 31 + 54 =
  26. 26.17 + 19 + 89 + 44 =
  27. 27.35 + 61 + 56 + 87 =
  28. 28.33 + 19 + 32 + 49 =
  29. 29.47 + 43 + 34 + 34 =
  30. 30.40 + 24 + 16 + 32 =
  31. 31.77 + 13 + 59 + 44 =
  32. 32.59 + 43 + 23 + 66 =
  33. 33.35 + 31 + 20 + 85 =
  34. 34.76 + 65 + 50 + 75 =
  35. 35.89 + 66 + 42 + 89 =
  36. 36.74 + 60 + 32 + 85 =
  37. 37.88 + 61 + 41 + 72 =
  38. 38.28 + 54 + 48 + 75 =
  39. 39.55 + 74 + 34 + 55 =
  40. 40.49 + 54 + 11 + 30 =

Answer key

  1. 223
  2. 185
  3. 255
  4. 191
  5. 193
  6. 228
  7. 232
  8. 198
  9. 222
  10. 136
  11. 188
  12. 191
  13. 157
  14. 141
  15. 168
  16. 132
  17. 152
  18. 183
  19. 132
  20. 253
  21. 219
  22. 188
  23. 200
  24. 180
  25. 147
  26. 169
  27. 239
  28. 133
  29. 158
  30. 112
  31. 193
  32. 191
  33. 171
  34. 266
  35. 286
  36. 251
  37. 262
  38. 205
  39. 218
  40. 144

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