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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 189 · 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 + 35 + 69 + 13 =
  2. 2.30 + 70 + 81 + 16 =
  3. 3.62 + 87 + 21 + 16 =
  4. 4.13 + 13 + 55 + 46 =
  5. 5.36 + 67 + 48 + 32 =
  6. 6.69 + 41 + 13 + 35 =
  7. 7.74 + 19 + 75 + 64 =
  8. 8.30 + 32 + 29 + 43 =
  9. 9.19 + 84 + 81 + 69 =
  10. 10.30 + 69 + 35 + 46 =
  11. 11.55 + 69 + 22 + 70 =
  12. 12.74 + 47 + 43 + 54 =
  13. 13.29 + 79 + 44 + 56 =
  14. 14.55 + 60 + 56 + 52 =
  15. 15.14 + 11 + 12 + 14 =
  16. 16.41 + 34 + 45 + 31 =
  17. 17.31 + 33 + 11 + 82 =
  18. 18.74 + 13 + 38 + 20 =
  19. 19.73 + 46 + 20 + 22 =
  20. 20.46 + 89 + 69 + 78 =
  21. 21.56 + 71 + 43 + 72 =
  22. 22.58 + 18 + 62 + 56 =
  23. 23.67 + 37 + 53 + 12 =
  24. 24.12 + 80 + 35 + 35 =
  25. 25.36 + 53 + 13 + 17 =
  26. 26.76 + 63 + 82 + 21 =
  27. 27.66 + 62 + 64 + 62 =
  28. 28.60 + 20 + 66 + 85 =
  29. 29.27 + 52 + 23 + 42 =
  30. 30.39 + 57 + 79 + 31 =
  31. 31.59 + 62 + 36 + 19 =
  32. 32.70 + 82 + 75 + 77 =
  33. 33.67 + 83 + 43 + 36 =
  34. 34.82 + 49 + 35 + 48 =
  35. 35.39 + 75 + 27 + 18 =
  36. 36.73 + 50 + 48 + 47 =
  37. 37.60 + 74 + 19 + 11 =
  38. 38.35 + 84 + 14 + 11 =
  39. 39.77 + 32 + 15 + 70 =
  40. 40.23 + 76 + 15 + 66 =

Answer key

  1. 144
  2. 197
  3. 186
  4. 127
  5. 183
  6. 158
  7. 232
  8. 134
  9. 253
  10. 180
  11. 216
  12. 218
  13. 208
  14. 223
  15. 51
  16. 151
  17. 157
  18. 145
  19. 161
  20. 282
  21. 242
  22. 194
  23. 169
  24. 162
  25. 119
  26. 242
  27. 254
  28. 231
  29. 144
  30. 206
  31. 176
  32. 304
  33. 229
  34. 214
  35. 159
  36. 218
  37. 164
  38. 144
  39. 194
  40. 180

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