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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 227 · 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. 1.35 + 12 + 52 + 42 =
  2. 2.82 + 41 + 16 + 18 =
  3. 3.68 + 54 + 72 + 70 =
  4. 4.43 + 13 + 75 + 88 =
  5. 5.27 + 30 + 14 + 16 =
  6. 6.30 + 14 + 77 + 65 =
  7. 7.23 + 69 + 46 + 73 =
  8. 8.41 + 80 + 49 + 11 =
  9. 9.54 + 73 + 51 + 15 =
  10. 10.88 + 15 + 37 + 28 =
  11. 11.22 + 61 + 79 + 18 =
  12. 12.65 + 31 + 11 + 15 =
  13. 13.51 + 26 + 70 + 68 =
  14. 14.32 + 36 + 50 + 24 =
  15. 15.67 + 14 + 19 + 27 =
  16. 16.88 + 20 + 34 + 53 =
  17. 17.22 + 12 + 33 + 80 =
  18. 18.77 + 46 + 23 + 83 =
  19. 19.23 + 44 + 67 + 55 =
  20. 20.87 + 71 + 51 + 25 =
  21. 21.47 + 18 + 74 + 84 =
  22. 22.38 + 56 + 34 + 35 =
  23. 23.41 + 54 + 47 + 85 =
  24. 24.36 + 60 + 51 + 46 =
  25. 25.50 + 51 + 22 + 81 =
  26. 26.47 + 21 + 38 + 15 =
  27. 27.75 + 33 + 65 + 51 =
  28. 28.16 + 29 + 41 + 43 =
  29. 29.31 + 22 + 81 + 22 =
  30. 30.79 + 50 + 72 + 71 =
  31. 31.29 + 59 + 73 + 81 =
  32. 32.46 + 68 + 48 + 54 =
  33. 33.41 + 68 + 30 + 55 =
  34. 34.59 + 36 + 61 + 81 =
  35. 35.55 + 79 + 23 + 71 =
  36. 36.32 + 29 + 17 + 53 =
  37. 37.56 + 60 + 86 + 42 =
  38. 38.45 + 18 + 17 + 34 =
  39. 39.71 + 25 + 17 + 30 =
  40. 40.75 + 22 + 29 + 51 =

Answer key

  1. 141
  2. 157
  3. 264
  4. 219
  5. 87
  6. 186
  7. 211
  8. 181
  9. 193
  10. 168
  11. 180
  12. 122
  13. 215
  14. 142
  15. 127
  16. 195
  17. 147
  18. 229
  19. 189
  20. 234
  21. 223
  22. 163
  23. 227
  24. 193
  25. 204
  26. 121
  27. 224
  28. 129
  29. 156
  30. 272
  31. 242
  32. 216
  33. 194
  34. 237
  35. 228
  36. 131
  37. 244
  38. 114
  39. 143
  40. 177

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