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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 276 · 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. 1.61 + 11 + 59 + 29 =
  2. 2.61 + 26 + 49 + 60 =
  3. 3.43 + 35 + 24 + 70 =
  4. 4.69 + 60 + 76 + 73 =
  5. 5.18 + 38 + 22 + 17 =
  6. 6.32 + 21 + 13 + 30 =
  7. 7.11 + 47 + 37 + 74 =
  8. 8.25 + 39 + 53 + 44 =
  9. 9.33 + 82 + 81 + 13 =
  10. 10.64 + 13 + 52 + 20 =
  11. 11.79 + 12 + 80 + 47 =
  12. 12.31 + 12 + 46 + 53 =
  13. 13.29 + 82 + 44 + 12 =
  14. 14.50 + 23 + 12 + 42 =
  15. 15.62 + 65 + 29 + 54 =
  16. 16.63 + 80 + 14 + 30 =
  17. 17.39 + 67 + 30 + 12 =
  18. 18.39 + 34 + 68 + 11 =
  19. 19.55 + 87 + 67 + 84 =
  20. 20.23 + 60 + 45 + 74 =
  21. 21.21 + 20 + 61 + 42 =
  22. 22.24 + 38 + 76 + 87 =
  23. 23.64 + 39 + 78 + 11 =
  24. 24.55 + 81 + 83 + 25 =
  25. 25.82 + 13 + 36 + 16 =
  26. 26.61 + 33 + 48 + 12 =
  27. 27.16 + 27 + 74 + 65 =
  28. 28.28 + 53 + 37 + 38 =
  29. 29.58 + 34 + 37 + 11 =
  30. 30.84 + 20 + 87 + 50 =
  31. 31.31 + 86 + 18 + 22 =
  32. 32.69 + 34 + 40 + 66 =
  33. 33.18 + 20 + 51 + 66 =
  34. 34.34 + 75 + 22 + 55 =
  35. 35.40 + 55 + 37 + 82 =
  36. 36.33 + 85 + 60 + 83 =
  37. 37.73 + 77 + 49 + 12 =
  38. 38.81 + 35 + 56 + 62 =
  39. 39.56 + 43 + 40 + 58 =
  40. 40.36 + 51 + 26 + 32 =

Answer key

  1. 160
  2. 196
  3. 172
  4. 278
  5. 95
  6. 96
  7. 169
  8. 161
  9. 209
  10. 149
  11. 218
  12. 142
  13. 167
  14. 127
  15. 210
  16. 187
  17. 148
  18. 152
  19. 293
  20. 202
  21. 144
  22. 225
  23. 192
  24. 244
  25. 147
  26. 154
  27. 182
  28. 156
  29. 140
  30. 241
  31. 157
  32. 209
  33. 155
  34. 186
  35. 214
  36. 261
  37. 211
  38. 234
  39. 197
  40. 145

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