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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 238 · 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. 1.11 + 79 + 17 + 41 =
  2. 2.48 + 27 + 30 + 40 =
  3. 3.28 + 50 + 43 + 17 =
  4. 4.27 + 33 + 57 + 15 =
  5. 5.12 + 12 + 59 + 62 =
  6. 6.40 + 82 + 28 + 68 =
  7. 7.37 + 16 + 11 + 66 =
  8. 8.66 + 82 + 24 + 69 =
  9. 9.18 + 63 + 42 + 46 =
  10. 10.29 + 45 + 48 + 66 =
  11. 11.81 + 20 + 32 + 68 =
  12. 12.38 + 19 + 57 + 39 =
  13. 13.28 + 40 + 32 + 34 =
  14. 14.81 + 50 + 11 + 26 =
  15. 15.17 + 14 + 40 + 40 =
  16. 16.34 + 60 + 15 + 48 =
  17. 17.11 + 69 + 72 + 26 =
  18. 18.70 + 29 + 86 + 18 =
  19. 19.32 + 36 + 35 + 68 =
  20. 20.19 + 16 + 35 + 79 =
  21. 21.87 + 73 + 83 + 70 =
  22. 22.43 + 79 + 84 + 15 =
  23. 23.24 + 48 + 34 + 80 =
  24. 24.24 + 89 + 54 + 59 =
  25. 25.64 + 51 + 85 + 52 =
  26. 26.54 + 22 + 58 + 49 =
  27. 27.26 + 25 + 83 + 54 =
  28. 28.23 + 85 + 58 + 40 =
  29. 29.64 + 62 + 41 + 89 =
  30. 30.44 + 87 + 46 + 82 =
  31. 31.32 + 19 + 43 + 80 =
  32. 32.34 + 57 + 67 + 74 =
  33. 33.33 + 33 + 33 + 75 =
  34. 34.60 + 63 + 29 + 63 =
  35. 35.55 + 75 + 76 + 36 =
  36. 36.23 + 89 + 50 + 40 =
  37. 37.36 + 78 + 80 + 43 =
  38. 38.32 + 88 + 89 + 51 =
  39. 39.24 + 18 + 55 + 16 =
  40. 40.31 + 23 + 80 + 84 =

Answer key

  1. 148
  2. 145
  3. 138
  4. 132
  5. 145
  6. 218
  7. 130
  8. 241
  9. 169
  10. 188
  11. 201
  12. 153
  13. 134
  14. 168
  15. 111
  16. 157
  17. 178
  18. 203
  19. 171
  20. 149
  21. 313
  22. 221
  23. 186
  24. 226
  25. 252
  26. 183
  27. 188
  28. 206
  29. 256
  30. 259
  31. 174
  32. 232
  33. 174
  34. 215
  35. 242
  36. 202
  37. 237
  38. 260
  39. 113
  40. 218

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