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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 575 · 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. 1.22 + 34 + 45 + 59 =
  2. 2.82 + 30 + 60 + 75 =
  3. 3.16 + 75 + 85 + 37 =
  4. 4.44 + 30 + 12 + 17 =
  5. 5.51 + 33 + 25 + 21 =
  6. 6.37 + 63 + 65 + 28 =
  7. 7.22 + 35 + 73 + 79 =
  8. 8.25 + 77 + 85 + 19 =
  9. 9.25 + 28 + 42 + 56 =
  10. 10.83 + 87 + 68 + 46 =
  11. 11.51 + 34 + 42 + 21 =
  12. 12.28 + 24 + 17 + 85 =
  13. 13.21 + 13 + 33 + 58 =
  14. 14.39 + 63 + 62 + 21 =
  15. 15.23 + 62 + 29 + 73 =
  16. 16.36 + 73 + 27 + 32 =
  17. 17.29 + 51 + 13 + 30 =
  18. 18.34 + 65 + 11 + 54 =
  19. 19.23 + 24 + 17 + 51 =
  20. 20.43 + 23 + 13 + 88 =
  21. 21.44 + 23 + 75 + 70 =
  22. 22.45 + 51 + 40 + 24 =
  23. 23.16 + 35 + 52 + 46 =
  24. 24.56 + 51 + 59 + 30 =
  25. 25.73 + 51 + 38 + 12 =
  26. 26.62 + 66 + 71 + 35 =
  27. 27.72 + 47 + 30 + 55 =
  28. 28.33 + 75 + 41 + 45 =
  29. 29.81 + 56 + 88 + 41 =
  30. 30.86 + 64 + 72 + 13 =
  31. 31.47 + 86 + 56 + 61 =
  32. 32.49 + 82 + 15 + 32 =
  33. 33.73 + 79 + 38 + 13 =
  34. 34.11 + 85 + 85 + 50 =
  35. 35.83 + 49 + 19 + 49 =
  36. 36.56 + 52 + 42 + 67 =
  37. 37.78 + 89 + 84 + 32 =
  38. 38.72 + 72 + 45 + 23 =
  39. 39.52 + 57 + 16 + 76 =
  40. 40.26 + 82 + 62 + 82 =

Answer key

  1. 160
  2. 247
  3. 213
  4. 103
  5. 130
  6. 193
  7. 209
  8. 206
  9. 151
  10. 284
  11. 148
  12. 154
  13. 125
  14. 185
  15. 187
  16. 168
  17. 123
  18. 164
  19. 115
  20. 167
  21. 212
  22. 160
  23. 149
  24. 196
  25. 174
  26. 234
  27. 204
  28. 194
  29. 266
  30. 235
  31. 250
  32. 178
  33. 203
  34. 231
  35. 200
  36. 217
  37. 283
  38. 212
  39. 201
  40. 252

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