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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 417 · 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. 1.27 + 33 + 42 + 51 =
  2. 2.81 + 51 + 71 + 18 =
  3. 3.36 + 59 + 17 + 11 =
  4. 4.56 + 77 + 17 + 80 =
  5. 5.76 + 38 + 15 + 35 =
  6. 6.73 + 77 + 56 + 12 =
  7. 7.35 + 23 + 36 + 14 =
  8. 8.86 + 14 + 69 + 72 =
  9. 9.18 + 31 + 14 + 24 =
  10. 10.21 + 25 + 85 + 46 =
  11. 11.26 + 40 + 13 + 41 =
  12. 12.29 + 73 + 28 + 68 =
  13. 13.34 + 35 + 64 + 27 =
  14. 14.78 + 85 + 18 + 49 =
  15. 15.58 + 19 + 29 + 87 =
  16. 16.56 + 23 + 15 + 60 =
  17. 17.43 + 42 + 26 + 15 =
  18. 18.21 + 11 + 75 + 63 =
  19. 19.33 + 81 + 78 + 43 =
  20. 20.83 + 55 + 58 + 59 =
  21. 21.48 + 56 + 23 + 64 =
  22. 22.12 + 89 + 80 + 35 =
  23. 23.58 + 13 + 41 + 83 =
  24. 24.11 + 41 + 13 + 26 =
  25. 25.54 + 39 + 73 + 84 =
  26. 26.62 + 15 + 25 + 41 =
  27. 27.15 + 85 + 24 + 20 =
  28. 28.55 + 11 + 35 + 67 =
  29. 29.82 + 32 + 73 + 88 =
  30. 30.89 + 38 + 59 + 24 =
  31. 31.31 + 25 + 43 + 50 =
  32. 32.48 + 78 + 56 + 44 =
  33. 33.71 + 14 + 86 + 78 =
  34. 34.76 + 84 + 12 + 56 =
  35. 35.67 + 73 + 36 + 35 =
  36. 36.27 + 57 + 40 + 57 =
  37. 37.60 + 59 + 82 + 69 =
  38. 38.12 + 86 + 12 + 86 =
  39. 39.63 + 78 + 69 + 35 =
  40. 40.67 + 74 + 53 + 50 =

Answer key

  1. 153
  2. 221
  3. 123
  4. 230
  5. 164
  6. 218
  7. 108
  8. 241
  9. 87
  10. 177
  11. 120
  12. 198
  13. 160
  14. 230
  15. 193
  16. 154
  17. 126
  18. 170
  19. 235
  20. 255
  21. 191
  22. 216
  23. 195
  24. 91
  25. 250
  26. 143
  27. 144
  28. 168
  29. 275
  30. 210
  31. 149
  32. 226
  33. 249
  34. 228
  35. 211
  36. 181
  37. 270
  38. 196
  39. 245
  40. 244

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