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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 558 · 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. 1.30 + 88 + 19 + 42 =
  2. 2.24 + 71 + 61 + 24 =
  3. 3.34 + 46 + 73 + 13 =
  4. 4.86 + 58 + 63 + 60 =
  5. 5.34 + 40 + 24 + 80 =
  6. 6.65 + 63 + 19 + 75 =
  7. 7.19 + 24 + 38 + 79 =
  8. 8.54 + 34 + 72 + 32 =
  9. 9.19 + 11 + 45 + 44 =
  10. 10.11 + 81 + 70 + 53 =
  11. 11.68 + 20 + 42 + 53 =
  12. 12.37 + 50 + 29 + 85 =
  13. 13.13 + 65 + 23 + 47 =
  14. 14.19 + 36 + 39 + 76 =
  15. 15.79 + 39 + 82 + 26 =
  16. 16.76 + 34 + 77 + 44 =
  17. 17.66 + 13 + 58 + 17 =
  18. 18.11 + 48 + 28 + 17 =
  19. 19.40 + 60 + 56 + 54 =
  20. 20.28 + 67 + 58 + 47 =
  21. 21.89 + 57 + 34 + 56 =
  22. 22.38 + 87 + 15 + 59 =
  23. 23.52 + 25 + 81 + 70 =
  24. 24.31 + 16 + 19 + 33 =
  25. 25.12 + 40 + 73 + 23 =
  26. 26.26 + 27 + 14 + 27 =
  27. 27.76 + 66 + 21 + 74 =
  28. 28.11 + 68 + 40 + 42 =
  29. 29.49 + 26 + 88 + 61 =
  30. 30.59 + 11 + 73 + 67 =
  31. 31.36 + 24 + 46 + 76 =
  32. 32.19 + 22 + 75 + 66 =
  33. 33.89 + 42 + 16 + 29 =
  34. 34.29 + 33 + 52 + 21 =
  35. 35.85 + 89 + 32 + 81 =
  36. 36.57 + 49 + 76 + 57 =
  37. 37.34 + 34 + 69 + 20 =
  38. 38.43 + 33 + 59 + 86 =
  39. 39.89 + 87 + 88 + 12 =
  40. 40.31 + 32 + 42 + 72 =

Answer key

  1. 179
  2. 180
  3. 166
  4. 267
  5. 178
  6. 222
  7. 160
  8. 192
  9. 119
  10. 215
  11. 183
  12. 201
  13. 148
  14. 170
  15. 226
  16. 231
  17. 154
  18. 104
  19. 210
  20. 200
  21. 236
  22. 199
  23. 228
  24. 99
  25. 148
  26. 94
  27. 237
  28. 161
  29. 224
  30. 210
  31. 182
  32. 182
  33. 176
  34. 135
  35. 287
  36. 239
  37. 157
  38. 221
  39. 276
  40. 177

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