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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 268 · 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. 1.67 + 50 + 11 + 62 =
  2. 2.63 + 74 + 67 + 11 =
  3. 3.28 + 25 + 59 + 18 =
  4. 4.17 + 25 + 22 + 28 =
  5. 5.24 + 11 + 63 + 62 =
  6. 6.34 + 27 + 24 + 26 =
  7. 7.36 + 78 + 60 + 87 =
  8. 8.60 + 46 + 78 + 66 =
  9. 9.83 + 14 + 62 + 83 =
  10. 10.60 + 16 + 83 + 83 =
  11. 11.20 + 56 + 58 + 12 =
  12. 12.52 + 78 + 19 + 29 =
  13. 13.68 + 62 + 11 + 39 =
  14. 14.17 + 19 + 88 + 69 =
  15. 15.62 + 75 + 26 + 87 =
  16. 16.36 + 78 + 43 + 75 =
  17. 17.29 + 14 + 62 + 67 =
  18. 18.79 + 33 + 68 + 65 =
  19. 19.48 + 31 + 50 + 26 =
  20. 20.54 + 33 + 60 + 36 =
  21. 21.75 + 50 + 69 + 78 =
  22. 22.50 + 54 + 27 + 36 =
  23. 23.77 + 48 + 25 + 53 =
  24. 24.65 + 78 + 25 + 53 =
  25. 25.42 + 11 + 67 + 30 =
  26. 26.72 + 64 + 62 + 22 =
  27. 27.42 + 86 + 35 + 35 =
  28. 28.21 + 34 + 56 + 42 =
  29. 29.84 + 15 + 63 + 34 =
  30. 30.12 + 31 + 29 + 13 =
  31. 31.71 + 73 + 40 + 60 =
  32. 32.89 + 22 + 42 + 83 =
  33. 33.30 + 37 + 11 + 88 =
  34. 34.84 + 73 + 76 + 23 =
  35. 35.31 + 21 + 26 + 42 =
  36. 36.65 + 11 + 39 + 16 =
  37. 37.18 + 37 + 16 + 88 =
  38. 38.59 + 50 + 20 + 57 =
  39. 39.59 + 50 + 50 + 25 =
  40. 40.43 + 80 + 21 + 66 =

Answer key

  1. 190
  2. 215
  3. 130
  4. 92
  5. 160
  6. 111
  7. 261
  8. 250
  9. 242
  10. 242
  11. 146
  12. 178
  13. 180
  14. 193
  15. 250
  16. 232
  17. 172
  18. 245
  19. 155
  20. 183
  21. 272
  22. 167
  23. 203
  24. 221
  25. 150
  26. 220
  27. 198
  28. 153
  29. 196
  30. 85
  31. 244
  32. 236
  33. 166
  34. 256
  35. 120
  36. 131
  37. 159
  38. 186
  39. 184
  40. 210

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