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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 381 · 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. 1.69 + 61 + 40 + 31 =
  2. 2.24 + 20 + 18 + 18 =
  3. 3.16 + 46 + 54 + 26 =
  4. 4.75 + 69 + 22 + 52 =
  5. 5.19 + 44 + 45 + 47 =
  6. 6.60 + 87 + 47 + 86 =
  7. 7.47 + 14 + 63 + 41 =
  8. 8.25 + 24 + 82 + 26 =
  9. 9.35 + 77 + 69 + 84 =
  10. 10.28 + 76 + 60 + 38 =
  11. 11.26 + 58 + 40 + 81 =
  12. 12.25 + 70 + 72 + 74 =
  13. 13.39 + 82 + 52 + 74 =
  14. 14.51 + 20 + 41 + 22 =
  15. 15.78 + 78 + 51 + 43 =
  16. 16.67 + 48 + 48 + 30 =
  17. 17.17 + 32 + 28 + 51 =
  18. 18.73 + 72 + 11 + 27 =
  19. 19.58 + 23 + 25 + 34 =
  20. 20.72 + 31 + 65 + 59 =
  21. 21.37 + 31 + 74 + 89 =
  22. 22.38 + 76 + 64 + 27 =
  23. 23.22 + 28 + 23 + 44 =
  24. 24.27 + 40 + 70 + 28 =
  25. 25.22 + 37 + 74 + 60 =
  26. 26.38 + 78 + 27 + 53 =
  27. 27.82 + 11 + 33 + 87 =
  28. 28.69 + 15 + 53 + 53 =
  29. 29.72 + 41 + 58 + 41 =
  30. 30.19 + 73 + 27 + 55 =
  31. 31.89 + 49 + 59 + 88 =
  32. 32.81 + 16 + 17 + 21 =
  33. 33.29 + 23 + 55 + 20 =
  34. 34.60 + 61 + 48 + 77 =
  35. 35.65 + 30 + 53 + 47 =
  36. 36.64 + 27 + 14 + 24 =
  37. 37.59 + 76 + 47 + 33 =
  38. 38.22 + 60 + 84 + 60 =
  39. 39.78 + 73 + 76 + 64 =
  40. 40.44 + 69 + 19 + 51 =

Answer key

  1. 201
  2. 80
  3. 142
  4. 218
  5. 155
  6. 280
  7. 165
  8. 157
  9. 265
  10. 202
  11. 205
  12. 241
  13. 247
  14. 134
  15. 250
  16. 193
  17. 128
  18. 183
  19. 140
  20. 227
  21. 231
  22. 205
  23. 117
  24. 165
  25. 193
  26. 196
  27. 213
  28. 190
  29. 212
  30. 174
  31. 285
  32. 135
  33. 127
  34. 246
  35. 195
  36. 129
  37. 215
  38. 226
  39. 291
  40. 183

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