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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 126 · 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. 1.66 + 79 + 61 + 15 =
  2. 2.42 + 85 + 49 + 83 =
  3. 3.84 + 66 + 21 + 11 =
  4. 4.67 + 53 + 46 + 28 =
  5. 5.83 + 36 + 84 + 51 =
  6. 6.45 + 58 + 84 + 47 =
  7. 7.75 + 46 + 64 + 61 =
  8. 8.83 + 69 + 84 + 45 =
  9. 9.85 + 14 + 38 + 36 =
  10. 10.12 + 85 + 66 + 57 =
  11. 11.77 + 43 + 86 + 60 =
  12. 12.81 + 27 + 53 + 50 =
  13. 13.36 + 11 + 11 + 42 =
  14. 14.24 + 17 + 31 + 71 =
  15. 15.66 + 59 + 32 + 67 =
  16. 16.12 + 62 + 50 + 36 =
  17. 17.24 + 73 + 57 + 18 =
  18. 18.85 + 32 + 53 + 58 =
  19. 19.64 + 74 + 89 + 30 =
  20. 20.78 + 19 + 72 + 13 =
  21. 21.84 + 74 + 82 + 29 =
  22. 22.30 + 12 + 68 + 41 =
  23. 23.54 + 22 + 76 + 41 =
  24. 24.44 + 85 + 86 + 84 =
  25. 25.50 + 74 + 70 + 37 =
  26. 26.55 + 75 + 68 + 86 =
  27. 27.72 + 28 + 89 + 87 =
  28. 28.29 + 51 + 26 + 87 =
  29. 29.43 + 82 + 68 + 28 =
  30. 30.73 + 49 + 47 + 55 =
  31. 31.76 + 32 + 65 + 23 =
  32. 32.84 + 48 + 89 + 84 =
  33. 33.45 + 29 + 24 + 31 =
  34. 34.18 + 82 + 47 + 23 =
  35. 35.67 + 31 + 16 + 12 =
  36. 36.64 + 19 + 23 + 48 =
  37. 37.25 + 47 + 37 + 12 =
  38. 38.29 + 29 + 13 + 26 =
  39. 39.50 + 26 + 28 + 21 =
  40. 40.34 + 12 + 45 + 31 =

Answer key

  1. 221
  2. 259
  3. 182
  4. 194
  5. 254
  6. 234
  7. 246
  8. 281
  9. 173
  10. 220
  11. 266
  12. 211
  13. 100
  14. 143
  15. 224
  16. 160
  17. 172
  18. 228
  19. 257
  20. 182
  21. 269
  22. 151
  23. 193
  24. 299
  25. 231
  26. 284
  27. 276
  28. 193
  29. 221
  30. 224
  31. 196
  32. 305
  33. 129
  34. 170
  35. 126
  36. 154
  37. 121
  38. 97
  39. 125
  40. 122

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