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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 751 · 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. 1.68 + 24 + 16 + 20 =
  2. 2.37 + 16 + 19 + 41 =
  3. 3.21 + 32 + 73 + 50 =
  4. 4.54 + 84 + 29 + 20 =
  5. 5.76 + 23 + 59 + 32 =
  6. 6.62 + 73 + 80 + 33 =
  7. 7.41 + 18 + 13 + 13 =
  8. 8.27 + 25 + 61 + 39 =
  9. 9.42 + 82 + 57 + 33 =
  10. 10.38 + 39 + 24 + 74 =
  11. 11.42 + 53 + 17 + 40 =
  12. 12.80 + 25 + 11 + 48 =
  13. 13.49 + 22 + 26 + 35 =
  14. 14.45 + 20 + 20 + 63 =
  15. 15.80 + 24 + 11 + 14 =
  16. 16.88 + 59 + 61 + 38 =
  17. 17.75 + 18 + 11 + 16 =
  18. 18.68 + 43 + 27 + 40 =
  19. 19.85 + 25 + 65 + 14 =
  20. 20.13 + 74 + 72 + 42 =
  21. 21.30 + 28 + 75 + 67 =
  22. 22.33 + 79 + 43 + 58 =
  23. 23.66 + 34 + 35 + 22 =
  24. 24.56 + 36 + 70 + 39 =
  25. 25.15 + 51 + 60 + 24 =
  26. 26.18 + 46 + 52 + 14 =
  27. 27.43 + 17 + 12 + 48 =
  28. 28.28 + 25 + 22 + 75 =
  29. 29.33 + 69 + 13 + 81 =
  30. 30.26 + 15 + 15 + 52 =
  31. 31.50 + 42 + 39 + 18 =
  32. 32.18 + 13 + 28 + 69 =
  33. 33.41 + 71 + 34 + 62 =
  34. 34.78 + 17 + 78 + 27 =
  35. 35.83 + 84 + 42 + 75 =
  36. 36.58 + 55 + 26 + 88 =
  37. 37.27 + 70 + 66 + 39 =
  38. 38.68 + 31 + 80 + 44 =
  39. 39.37 + 19 + 52 + 23 =
  40. 40.21 + 26 + 32 + 58 =

Answer key

  1. 128
  2. 113
  3. 176
  4. 187
  5. 190
  6. 248
  7. 85
  8. 152
  9. 214
  10. 175
  11. 152
  12. 164
  13. 132
  14. 148
  15. 129
  16. 246
  17. 120
  18. 178
  19. 189
  20. 201
  21. 200
  22. 213
  23. 157
  24. 201
  25. 150
  26. 130
  27. 120
  28. 150
  29. 196
  30. 108
  31. 149
  32. 128
  33. 208
  34. 200
  35. 284
  36. 227
  37. 202
  38. 223
  39. 131
  40. 137

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