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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 713 · 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. 1.55 + 55 + 60 + 80 =
  2. 2.60 + 33 + 40 + 28 =
  3. 3.40 + 79 + 40 + 30 =
  4. 4.88 + 11 + 89 + 46 =
  5. 5.31 + 71 + 15 + 20 =
  6. 6.62 + 68 + 53 + 86 =
  7. 7.55 + 39 + 33 + 40 =
  8. 8.82 + 21 + 43 + 11 =
  9. 9.15 + 85 + 66 + 38 =
  10. 10.24 + 17 + 79 + 25 =
  11. 11.71 + 79 + 16 + 17 =
  12. 12.42 + 80 + 13 + 51 =
  13. 13.26 + 15 + 72 + 47 =
  14. 14.75 + 12 + 43 + 28 =
  15. 15.24 + 25 + 20 + 63 =
  16. 16.70 + 22 + 64 + 25 =
  17. 17.33 + 23 + 86 + 59 =
  18. 18.33 + 20 + 30 + 24 =
  19. 19.14 + 32 + 86 + 13 =
  20. 20.59 + 29 + 26 + 65 =
  21. 21.52 + 69 + 60 + 14 =
  22. 22.59 + 67 + 26 + 67 =
  23. 23.89 + 37 + 35 + 14 =
  24. 24.24 + 29 + 35 + 19 =
  25. 25.59 + 53 + 48 + 82 =
  26. 26.28 + 16 + 85 + 43 =
  27. 27.37 + 84 + 38 + 73 =
  28. 28.31 + 73 + 28 + 42 =
  29. 29.74 + 52 + 55 + 29 =
  30. 30.76 + 69 + 56 + 86 =
  31. 31.84 + 25 + 50 + 63 =
  32. 32.84 + 81 + 89 + 44 =
  33. 33.89 + 13 + 54 + 18 =
  34. 34.14 + 17 + 61 + 77 =
  35. 35.62 + 25 + 20 + 22 =
  36. 36.53 + 22 + 37 + 23 =
  37. 37.28 + 62 + 12 + 83 =
  38. 38.36 + 41 + 45 + 61 =
  39. 39.46 + 51 + 57 + 33 =
  40. 40.74 + 76 + 24 + 86 =

Answer key

  1. 250
  2. 161
  3. 189
  4. 234
  5. 137
  6. 269
  7. 167
  8. 157
  9. 204
  10. 145
  11. 183
  12. 186
  13. 160
  14. 158
  15. 132
  16. 181
  17. 201
  18. 107
  19. 145
  20. 179
  21. 195
  22. 219
  23. 175
  24. 107
  25. 242
  26. 172
  27. 232
  28. 174
  29. 210
  30. 287
  31. 222
  32. 298
  33. 174
  34. 169
  35. 129
  36. 135
  37. 185
  38. 183
  39. 187
  40. 260

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