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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 159 · 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. 1.77 + 42 + 85 + 15 =
  2. 2.51 + 81 + 70 + 39 =
  3. 3.48 + 43 + 11 + 47 =
  4. 4.17 + 68 + 70 + 55 =
  5. 5.80 + 19 + 55 + 70 =
  6. 6.22 + 32 + 27 + 13 =
  7. 7.19 + 22 + 89 + 19 =
  8. 8.83 + 76 + 70 + 52 =
  9. 9.63 + 42 + 58 + 32 =
  10. 10.73 + 55 + 31 + 50 =
  11. 11.20 + 80 + 73 + 23 =
  12. 12.70 + 37 + 72 + 52 =
  13. 13.37 + 35 + 57 + 58 =
  14. 14.33 + 12 + 13 + 11 =
  15. 15.54 + 11 + 89 + 27 =
  16. 16.46 + 70 + 50 + 50 =
  17. 17.27 + 65 + 28 + 21 =
  18. 18.34 + 88 + 34 + 42 =
  19. 19.64 + 54 + 78 + 26 =
  20. 20.79 + 49 + 51 + 15 =
  21. 21.86 + 48 + 11 + 36 =
  22. 22.54 + 68 + 54 + 83 =
  23. 23.35 + 13 + 24 + 82 =
  24. 24.55 + 82 + 89 + 54 =
  25. 25.11 + 74 + 60 + 44 =
  26. 26.49 + 62 + 21 + 65 =
  27. 27.76 + 77 + 29 + 52 =
  28. 28.83 + 38 + 11 + 52 =
  29. 29.19 + 73 + 58 + 67 =
  30. 30.63 + 24 + 35 + 74 =
  31. 31.84 + 29 + 48 + 87 =
  32. 32.33 + 28 + 48 + 21 =
  33. 33.50 + 39 + 19 + 60 =
  34. 34.22 + 77 + 34 + 62 =
  35. 35.87 + 88 + 83 + 15 =
  36. 36.20 + 28 + 82 + 54 =
  37. 37.46 + 12 + 16 + 16 =
  38. 38.48 + 34 + 43 + 75 =
  39. 39.87 + 30 + 55 + 23 =
  40. 40.69 + 81 + 89 + 22 =

Answer key

  1. 219
  2. 241
  3. 149
  4. 210
  5. 224
  6. 94
  7. 149
  8. 281
  9. 195
  10. 209
  11. 196
  12. 231
  13. 187
  14. 69
  15. 181
  16. 216
  17. 141
  18. 198
  19. 222
  20. 194
  21. 181
  22. 259
  23. 154
  24. 280
  25. 189
  26. 197
  27. 234
  28. 184
  29. 217
  30. 196
  31. 248
  32. 130
  33. 168
  34. 195
  35. 273
  36. 184
  37. 90
  38. 200
  39. 195
  40. 261

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