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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 821 · 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. 1.65 + 29 + 42 + 56 =
  2. 2.40 + 27 + 23 + 40 =
  3. 3.28 + 77 + 56 + 52 =
  4. 4.80 + 44 + 34 + 87 =
  5. 5.52 + 26 + 11 + 19 =
  6. 6.57 + 13 + 74 + 19 =
  7. 7.25 + 77 + 41 + 67 =
  8. 8.78 + 60 + 71 + 35 =
  9. 9.43 + 45 + 23 + 52 =
  10. 10.76 + 65 + 20 + 66 =
  11. 11.86 + 84 + 28 + 82 =
  12. 12.38 + 30 + 76 + 41 =
  13. 13.71 + 78 + 14 + 83 =
  14. 14.21 + 78 + 49 + 74 =
  15. 15.52 + 69 + 56 + 21 =
  16. 16.28 + 28 + 25 + 33 =
  17. 17.31 + 35 + 48 + 50 =
  18. 18.20 + 63 + 57 + 82 =
  19. 19.35 + 57 + 70 + 13 =
  20. 20.52 + 15 + 75 + 46 =
  21. 21.27 + 19 + 64 + 68 =
  22. 22.50 + 30 + 85 + 82 =
  23. 23.30 + 37 + 64 + 83 =
  24. 24.41 + 54 + 54 + 43 =
  25. 25.33 + 61 + 31 + 11 =
  26. 26.47 + 14 + 16 + 17 =
  27. 27.20 + 33 + 61 + 55 =
  28. 28.25 + 87 + 65 + 74 =
  29. 29.82 + 36 + 38 + 21 =
  30. 30.45 + 43 + 79 + 78 =
  31. 31.12 + 13 + 24 + 75 =
  32. 32.47 + 37 + 65 + 33 =
  33. 33.62 + 84 + 54 + 26 =
  34. 34.53 + 36 + 32 + 44 =
  35. 35.66 + 69 + 16 + 87 =
  36. 36.53 + 82 + 41 + 12 =
  37. 37.82 + 84 + 47 + 20 =
  38. 38.63 + 16 + 25 + 32 =
  39. 39.75 + 71 + 13 + 32 =
  40. 40.53 + 26 + 39 + 18 =

Answer key

  1. 192
  2. 130
  3. 213
  4. 245
  5. 108
  6. 163
  7. 210
  8. 244
  9. 163
  10. 227
  11. 280
  12. 185
  13. 246
  14. 222
  15. 198
  16. 114
  17. 164
  18. 222
  19. 175
  20. 188
  21. 178
  22. 247
  23. 214
  24. 192
  25. 136
  26. 94
  27. 169
  28. 251
  29. 177
  30. 245
  31. 124
  32. 182
  33. 226
  34. 165
  35. 238
  36. 188
  37. 233
  38. 136
  39. 191
  40. 136

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