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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 234 · 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. 1.13 + 82 + 66 + 48 =
  2. 2.81 + 13 + 46 + 72 =
  3. 3.48 + 71 + 19 + 30 =
  4. 4.56 + 57 + 22 + 65 =
  5. 5.37 + 25 + 20 + 67 =
  6. 6.24 + 61 + 82 + 73 =
  7. 7.54 + 37 + 17 + 72 =
  8. 8.54 + 41 + 76 + 28 =
  9. 9.32 + 89 + 13 + 27 =
  10. 10.31 + 56 + 16 + 52 =
  11. 11.18 + 58 + 88 + 80 =
  12. 12.41 + 46 + 30 + 28 =
  13. 13.38 + 17 + 46 + 19 =
  14. 14.51 + 74 + 14 + 72 =
  15. 15.53 + 12 + 38 + 77 =
  16. 16.15 + 73 + 24 + 20 =
  17. 17.64 + 85 + 31 + 78 =
  18. 18.37 + 85 + 24 + 84 =
  19. 19.23 + 40 + 72 + 72 =
  20. 20.80 + 26 + 53 + 67 =
  21. 21.29 + 62 + 88 + 42 =
  22. 22.36 + 18 + 60 + 18 =
  23. 23.71 + 59 + 89 + 36 =
  24. 24.57 + 59 + 69 + 84 =
  25. 25.51 + 61 + 12 + 51 =
  26. 26.72 + 84 + 36 + 77 =
  27. 27.81 + 54 + 89 + 17 =
  28. 28.11 + 45 + 54 + 19 =
  29. 29.47 + 66 + 21 + 74 =
  30. 30.85 + 72 + 19 + 75 =
  31. 31.14 + 54 + 42 + 82 =
  32. 32.47 + 45 + 11 + 57 =
  33. 33.78 + 87 + 15 + 70 =
  34. 34.65 + 28 + 26 + 55 =
  35. 35.48 + 46 + 68 + 74 =
  36. 36.72 + 31 + 67 + 60 =
  37. 37.71 + 80 + 20 + 67 =
  38. 38.27 + 55 + 23 + 22 =
  39. 39.38 + 79 + 60 + 50 =
  40. 40.61 + 26 + 36 + 88 =

Answer key

  1. 209
  2. 212
  3. 168
  4. 200
  5. 149
  6. 240
  7. 180
  8. 199
  9. 161
  10. 155
  11. 244
  12. 145
  13. 120
  14. 211
  15. 180
  16. 132
  17. 258
  18. 230
  19. 207
  20. 226
  21. 221
  22. 132
  23. 255
  24. 269
  25. 175
  26. 269
  27. 241
  28. 129
  29. 208
  30. 251
  31. 192
  32. 160
  33. 250
  34. 174
  35. 236
  36. 230
  37. 238
  38. 127
  39. 227
  40. 211

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