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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 474 · 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. 1.43 + 16 + 27 + 46 =
  2. 2.38 + 48 + 17 + 25 =
  3. 3.32 + 72 + 35 + 21 =
  4. 4.12 + 50 + 89 + 53 =
  5. 5.71 + 83 + 73 + 42 =
  6. 6.42 + 57 + 57 + 42 =
  7. 7.15 + 21 + 24 + 16 =
  8. 8.47 + 61 + 40 + 40 =
  9. 9.82 + 18 + 18 + 62 =
  10. 10.79 + 38 + 71 + 34 =
  11. 11.71 + 70 + 43 + 77 =
  12. 12.61 + 17 + 52 + 64 =
  13. 13.51 + 15 + 33 + 89 =
  14. 14.21 + 44 + 27 + 61 =
  15. 15.68 + 27 + 32 + 74 =
  16. 16.19 + 25 + 21 + 44 =
  17. 17.25 + 78 + 75 + 84 =
  18. 18.63 + 33 + 39 + 61 =
  19. 19.21 + 40 + 42 + 31 =
  20. 20.70 + 31 + 71 + 48 =
  21. 21.57 + 58 + 14 + 75 =
  22. 22.23 + 32 + 71 + 64 =
  23. 23.47 + 25 + 56 + 34 =
  24. 24.66 + 63 + 14 + 59 =
  25. 25.32 + 57 + 50 + 49 =
  26. 26.53 + 28 + 28 + 43 =
  27. 27.82 + 20 + 78 + 73 =
  28. 28.16 + 42 + 39 + 46 =
  29. 29.46 + 70 + 78 + 41 =
  30. 30.25 + 29 + 24 + 71 =
  31. 31.61 + 37 + 69 + 46 =
  32. 32.79 + 50 + 58 + 25 =
  33. 33.29 + 51 + 78 + 38 =
  34. 34.18 + 77 + 48 + 24 =
  35. 35.67 + 80 + 30 + 33 =
  36. 36.22 + 35 + 27 + 45 =
  37. 37.31 + 60 + 72 + 73 =
  38. 38.41 + 22 + 28 + 17 =
  39. 39.68 + 22 + 66 + 33 =
  40. 40.80 + 17 + 65 + 87 =

Answer key

  1. 132
  2. 128
  3. 160
  4. 204
  5. 269
  6. 198
  7. 76
  8. 188
  9. 180
  10. 222
  11. 261
  12. 194
  13. 188
  14. 153
  15. 201
  16. 109
  17. 262
  18. 196
  19. 134
  20. 220
  21. 204
  22. 190
  23. 162
  24. 202
  25. 188
  26. 152
  27. 253
  28. 143
  29. 235
  30. 149
  31. 213
  32. 212
  33. 196
  34. 167
  35. 210
  36. 129
  37. 236
  38. 108
  39. 189
  40. 249

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