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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 15 · 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. 1.31 + 12 + 26 + 37 =
  2. 2.29 + 33 + 36 + 25 =
  3. 3.80 + 11 + 54 + 28 =
  4. 4.41 + 32 + 77 + 43 =
  5. 5.87 + 65 + 46 + 77 =
  6. 6.54 + 63 + 35 + 22 =
  7. 7.50 + 67 + 71 + 70 =
  8. 8.64 + 25 + 20 + 47 =
  9. 9.37 + 34 + 14 + 14 =
  10. 10.53 + 22 + 83 + 45 =
  11. 11.47 + 82 + 33 + 47 =
  12. 12.40 + 66 + 55 + 26 =
  13. 13.72 + 27 + 59 + 36 =
  14. 14.21 + 20 + 75 + 33 =
  15. 15.77 + 38 + 54 + 23 =
  16. 16.25 + 82 + 72 + 13 =
  17. 17.68 + 84 + 66 + 18 =
  18. 18.39 + 50 + 42 + 54 =
  19. 19.12 + 23 + 31 + 47 =
  20. 20.71 + 24 + 60 + 45 =
  21. 21.59 + 70 + 64 + 51 =
  22. 22.54 + 62 + 60 + 27 =
  23. 23.34 + 34 + 57 + 13 =
  24. 24.30 + 39 + 28 + 72 =
  25. 25.66 + 28 + 69 + 28 =
  26. 26.31 + 17 + 14 + 55 =
  27. 27.72 + 13 + 43 + 28 =
  28. 28.80 + 41 + 19 + 46 =
  29. 29.35 + 57 + 62 + 75 =
  30. 30.25 + 62 + 12 + 18 =
  31. 31.63 + 15 + 84 + 59 =
  32. 32.34 + 73 + 25 + 45 =
  33. 33.61 + 82 + 16 + 73 =
  34. 34.26 + 82 + 40 + 61 =
  35. 35.25 + 66 + 11 + 27 =
  36. 36.67 + 37 + 13 + 21 =
  37. 37.73 + 85 + 78 + 73 =
  38. 38.80 + 42 + 19 + 11 =
  39. 39.33 + 72 + 26 + 12 =
  40. 40.18 + 62 + 16 + 28 =

Answer key

  1. 106
  2. 123
  3. 173
  4. 193
  5. 275
  6. 174
  7. 258
  8. 156
  9. 99
  10. 203
  11. 209
  12. 187
  13. 194
  14. 149
  15. 192
  16. 192
  17. 236
  18. 185
  19. 113
  20. 200
  21. 244
  22. 203
  23. 138
  24. 169
  25. 191
  26. 117
  27. 156
  28. 186
  29. 229
  30. 117
  31. 221
  32. 177
  33. 232
  34. 209
  35. 129
  36. 138
  37. 309
  38. 152
  39. 143
  40. 124

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