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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 535 · 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. 1.42 + 15 + 81 + 64 =
  2. 2.39 + 75 + 61 + 74 =
  3. 3.42 + 82 + 59 + 37 =
  4. 4.51 + 88 + 53 + 19 =
  5. 5.17 + 84 + 32 + 20 =
  6. 6.24 + 49 + 16 + 32 =
  7. 7.42 + 59 + 78 + 46 =
  8. 8.25 + 19 + 60 + 13 =
  9. 9.26 + 62 + 19 + 54 =
  10. 10.42 + 12 + 45 + 40 =
  11. 11.11 + 83 + 34 + 55 =
  12. 12.37 + 70 + 12 + 30 =
  13. 13.18 + 64 + 86 + 49 =
  14. 14.59 + 26 + 66 + 84 =
  15. 15.88 + 59 + 26 + 48 =
  16. 16.23 + 85 + 83 + 48 =
  17. 17.45 + 32 + 77 + 44 =
  18. 18.86 + 26 + 78 + 34 =
  19. 19.21 + 37 + 53 + 14 =
  20. 20.86 + 15 + 23 + 15 =
  21. 21.28 + 27 + 88 + 74 =
  22. 22.34 + 20 + 78 + 19 =
  23. 23.44 + 72 + 15 + 27 =
  24. 24.45 + 73 + 32 + 15 =
  25. 25.65 + 53 + 62 + 15 =
  26. 26.51 + 30 + 33 + 70 =
  27. 27.28 + 51 + 56 + 45 =
  28. 28.87 + 15 + 14 + 40 =
  29. 29.72 + 41 + 87 + 82 =
  30. 30.34 + 40 + 83 + 31 =
  31. 31.22 + 72 + 36 + 25 =
  32. 32.35 + 56 + 23 + 45 =
  33. 33.77 + 87 + 11 + 69 =
  34. 34.54 + 47 + 26 + 73 =
  35. 35.55 + 65 + 80 + 61 =
  36. 36.76 + 50 + 32 + 16 =
  37. 37.68 + 22 + 30 + 53 =
  38. 38.49 + 71 + 70 + 35 =
  39. 39.75 + 66 + 51 + 54 =
  40. 40.16 + 53 + 46 + 68 =

Answer key

  1. 202
  2. 249
  3. 220
  4. 211
  5. 153
  6. 121
  7. 225
  8. 117
  9. 161
  10. 139
  11. 183
  12. 149
  13. 217
  14. 235
  15. 221
  16. 239
  17. 198
  18. 224
  19. 125
  20. 139
  21. 217
  22. 151
  23. 158
  24. 165
  25. 195
  26. 184
  27. 180
  28. 156
  29. 282
  30. 188
  31. 155
  32. 159
  33. 244
  34. 200
  35. 261
  36. 174
  37. 173
  38. 225
  39. 246
  40. 183

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