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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 421 · 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. 1.67 + 61 + 35 + 83 =
  2. 2.36 + 12 + 71 + 48 =
  3. 3.56 + 20 + 73 + 88 =
  4. 4.69 + 54 + 43 + 37 =
  5. 5.82 + 28 + 84 + 12 =
  6. 6.18 + 13 + 32 + 86 =
  7. 7.38 + 28 + 48 + 18 =
  8. 8.20 + 19 + 87 + 75 =
  9. 9.72 + 21 + 76 + 56 =
  10. 10.68 + 48 + 88 + 46 =
  11. 11.57 + 63 + 77 + 64 =
  12. 12.35 + 12 + 28 + 48 =
  13. 13.75 + 63 + 71 + 15 =
  14. 14.27 + 58 + 84 + 82 =
  15. 15.70 + 38 + 31 + 62 =
  16. 16.68 + 26 + 41 + 86 =
  17. 17.75 + 34 + 13 + 56 =
  18. 18.28 + 77 + 23 + 44 =
  19. 19.25 + 18 + 60 + 77 =
  20. 20.37 + 87 + 62 + 60 =
  21. 21.32 + 25 + 20 + 59 =
  22. 22.46 + 18 + 57 + 37 =
  23. 23.30 + 72 + 76 + 42 =
  24. 24.51 + 41 + 48 + 37 =
  25. 25.23 + 32 + 66 + 36 =
  26. 26.55 + 20 + 61 + 63 =
  27. 27.61 + 37 + 20 + 14 =
  28. 28.26 + 53 + 42 + 45 =
  29. 29.54 + 48 + 25 + 34 =
  30. 30.47 + 87 + 47 + 88 =
  31. 31.39 + 17 + 72 + 69 =
  32. 32.35 + 88 + 31 + 56 =
  33. 33.38 + 53 + 84 + 11 =
  34. 34.44 + 49 + 70 + 76 =
  35. 35.15 + 87 + 86 + 24 =
  36. 36.71 + 61 + 56 + 39 =
  37. 37.68 + 25 + 33 + 73 =
  38. 38.28 + 47 + 69 + 53 =
  39. 39.46 + 22 + 40 + 81 =
  40. 40.15 + 32 + 54 + 19 =

Answer key

  1. 246
  2. 167
  3. 237
  4. 203
  5. 206
  6. 149
  7. 132
  8. 201
  9. 225
  10. 250
  11. 261
  12. 123
  13. 224
  14. 251
  15. 201
  16. 221
  17. 178
  18. 172
  19. 180
  20. 246
  21. 136
  22. 158
  23. 220
  24. 177
  25. 157
  26. 199
  27. 132
  28. 166
  29. 161
  30. 269
  31. 197
  32. 210
  33. 186
  34. 239
  35. 212
  36. 227
  37. 199
  38. 197
  39. 189
  40. 120

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