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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 5 · 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. 1.82 + 33 + 27 + 50 =
  2. 2.47 + 29 + 32 + 81 =
  3. 3.31 + 62 + 60 + 62 =
  4. 4.34 + 79 + 58 + 81 =
  5. 5.61 + 14 + 14 + 31 =
  6. 6.34 + 18 + 34 + 43 =
  7. 7.53 + 25 + 84 + 88 =
  8. 8.51 + 86 + 88 + 24 =
  9. 9.63 + 29 + 11 + 63 =
  10. 10.52 + 66 + 30 + 59 =
  11. 11.81 + 35 + 30 + 25 =
  12. 12.35 + 64 + 23 + 79 =
  13. 13.21 + 45 + 31 + 74 =
  14. 14.77 + 12 + 45 + 53 =
  15. 15.26 + 84 + 57 + 75 =
  16. 16.31 + 67 + 18 + 11 =
  17. 17.21 + 30 + 14 + 27 =
  18. 18.55 + 37 + 68 + 52 =
  19. 19.65 + 23 + 53 + 29 =
  20. 20.32 + 89 + 56 + 26 =
  21. 21.22 + 55 + 20 + 55 =
  22. 22.80 + 19 + 59 + 60 =
  23. 23.69 + 33 + 62 + 11 =
  24. 24.68 + 31 + 37 + 19 =
  25. 25.14 + 21 + 56 + 20 =
  26. 26.37 + 29 + 37 + 79 =
  27. 27.40 + 39 + 13 + 55 =
  28. 28.74 + 23 + 30 + 34 =
  29. 29.15 + 20 + 84 + 74 =
  30. 30.30 + 82 + 68 + 28 =
  31. 31.27 + 73 + 89 + 60 =
  32. 32.54 + 83 + 65 + 16 =
  33. 33.86 + 44 + 68 + 38 =
  34. 34.53 + 79 + 71 + 65 =
  35. 35.50 + 50 + 70 + 58 =
  36. 36.50 + 16 + 12 + 44 =
  37. 37.21 + 79 + 29 + 45 =
  38. 38.54 + 79 + 18 + 77 =
  39. 39.31 + 65 + 24 + 39 =
  40. 40.34 + 19 + 30 + 59 =

Answer key

  1. 192
  2. 189
  3. 215
  4. 252
  5. 120
  6. 129
  7. 250
  8. 249
  9. 166
  10. 207
  11. 171
  12. 201
  13. 171
  14. 187
  15. 242
  16. 127
  17. 92
  18. 212
  19. 170
  20. 203
  21. 152
  22. 218
  23. 175
  24. 155
  25. 111
  26. 182
  27. 147
  28. 161
  29. 193
  30. 208
  31. 249
  32. 218
  33. 236
  34. 268
  35. 228
  36. 122
  37. 174
  38. 228
  39. 159
  40. 142

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