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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 816 · 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. 1.29 + 13 + 30 + 44 =
  2. 2.28 + 50 + 25 + 18 =
  3. 3.65 + 72 + 35 + 39 =
  4. 4.18 + 22 + 48 + 61 =
  5. 5.37 + 33 + 43 + 33 =
  6. 6.19 + 45 + 11 + 86 =
  7. 7.38 + 31 + 26 + 78 =
  8. 8.33 + 43 + 22 + 34 =
  9. 9.41 + 24 + 34 + 24 =
  10. 10.17 + 73 + 54 + 13 =
  11. 11.71 + 22 + 71 + 62 =
  12. 12.45 + 33 + 18 + 65 =
  13. 13.11 + 38 + 43 + 76 =
  14. 14.42 + 84 + 70 + 57 =
  15. 15.33 + 19 + 22 + 49 =
  16. 16.80 + 54 + 46 + 66 =
  17. 17.62 + 58 + 62 + 68 =
  18. 18.40 + 46 + 14 + 12 =
  19. 19.86 + 54 + 17 + 11 =
  20. 20.49 + 72 + 81 + 41 =
  21. 21.24 + 22 + 54 + 78 =
  22. 22.17 + 11 + 18 + 15 =
  23. 23.85 + 74 + 63 + 76 =
  24. 24.34 + 26 + 63 + 86 =
  25. 25.34 + 74 + 72 + 23 =
  26. 26.81 + 82 + 82 + 59 =
  27. 27.60 + 78 + 69 + 82 =
  28. 28.11 + 89 + 76 + 75 =
  29. 29.86 + 45 + 64 + 77 =
  30. 30.86 + 79 + 20 + 26 =
  31. 31.89 + 57 + 51 + 42 =
  32. 32.24 + 48 + 18 + 86 =
  33. 33.41 + 41 + 89 + 60 =
  34. 34.79 + 35 + 65 + 41 =
  35. 35.43 + 74 + 32 + 15 =
  36. 36.21 + 78 + 81 + 21 =
  37. 37.76 + 83 + 56 + 34 =
  38. 38.58 + 16 + 28 + 86 =
  39. 39.33 + 45 + 60 + 76 =
  40. 40.51 + 19 + 67 + 81 =

Answer key

  1. 116
  2. 121
  3. 211
  4. 149
  5. 146
  6. 161
  7. 173
  8. 132
  9. 123
  10. 157
  11. 226
  12. 161
  13. 168
  14. 253
  15. 123
  16. 246
  17. 250
  18. 112
  19. 168
  20. 243
  21. 178
  22. 61
  23. 298
  24. 209
  25. 203
  26. 304
  27. 289
  28. 251
  29. 272
  30. 211
  31. 239
  32. 176
  33. 231
  34. 220
  35. 164
  36. 201
  37. 249
  38. 188
  39. 214
  40. 218

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