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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 172 · 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. 1.40 + 14 + 74 + 74 =
  2. 2.67 + 38 + 75 + 33 =
  3. 3.50 + 83 + 38 + 38 =
  4. 4.44 + 76 + 45 + 73 =
  5. 5.55 + 55 + 21 + 72 =
  6. 6.67 + 14 + 22 + 29 =
  7. 7.26 + 14 + 67 + 27 =
  8. 8.63 + 58 + 27 + 65 =
  9. 9.12 + 19 + 73 + 56 =
  10. 10.60 + 66 + 48 + 38 =
  11. 11.15 + 37 + 63 + 59 =
  12. 12.28 + 89 + 43 + 46 =
  13. 13.79 + 81 + 64 + 63 =
  14. 14.67 + 31 + 63 + 50 =
  15. 15.25 + 89 + 71 + 79 =
  16. 16.72 + 72 + 32 + 20 =
  17. 17.68 + 20 + 85 + 52 =
  18. 18.42 + 35 + 25 + 17 =
  19. 19.68 + 39 + 26 + 80 =
  20. 20.25 + 22 + 34 + 12 =
  21. 21.34 + 60 + 25 + 71 =
  22. 22.52 + 13 + 32 + 38 =
  23. 23.44 + 67 + 84 + 85 =
  24. 24.12 + 32 + 61 + 40 =
  25. 25.56 + 12 + 44 + 12 =
  26. 26.68 + 33 + 82 + 57 =
  27. 27.85 + 28 + 72 + 79 =
  28. 28.14 + 36 + 30 + 78 =
  29. 29.63 + 66 + 57 + 69 =
  30. 30.59 + 86 + 79 + 52 =
  31. 31.17 + 84 + 19 + 46 =
  32. 32.67 + 20 + 75 + 62 =
  33. 33.50 + 24 + 42 + 79 =
  34. 34.31 + 44 + 21 + 53 =
  35. 35.29 + 27 + 26 + 57 =
  36. 36.87 + 22 + 76 + 36 =
  37. 37.24 + 33 + 67 + 63 =
  38. 38.32 + 89 + 23 + 66 =
  39. 39.56 + 25 + 25 + 11 =
  40. 40.12 + 44 + 27 + 20 =

Answer key

  1. 202
  2. 213
  3. 209
  4. 238
  5. 203
  6. 132
  7. 134
  8. 213
  9. 160
  10. 212
  11. 174
  12. 206
  13. 287
  14. 211
  15. 264
  16. 196
  17. 225
  18. 119
  19. 213
  20. 93
  21. 190
  22. 135
  23. 280
  24. 145
  25. 124
  26. 240
  27. 264
  28. 158
  29. 255
  30. 276
  31. 166
  32. 224
  33. 195
  34. 149
  35. 139
  36. 221
  37. 187
  38. 210
  39. 117
  40. 103

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