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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 162 · 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. 1.89 + 51 + 77 + 31 =
  2. 2.73 + 14 + 85 + 87 =
  3. 3.21 + 16 + 36 + 31 =
  4. 4.58 + 50 + 31 + 81 =
  5. 5.57 + 15 + 18 + 82 =
  6. 6.75 + 78 + 83 + 17 =
  7. 7.61 + 47 + 76 + 43 =
  8. 8.35 + 75 + 62 + 39 =
  9. 9.28 + 64 + 62 + 44 =
  10. 10.85 + 61 + 19 + 35 =
  11. 11.75 + 71 + 29 + 11 =
  12. 12.54 + 58 + 59 + 79 =
  13. 13.27 + 31 + 48 + 44 =
  14. 14.79 + 52 + 55 + 27 =
  15. 15.41 + 41 + 55 + 87 =
  16. 16.77 + 34 + 27 + 33 =
  17. 17.42 + 24 + 89 + 64 =
  18. 18.32 + 31 + 25 + 33 =
  19. 19.13 + 60 + 58 + 14 =
  20. 20.32 + 41 + 64 + 31 =
  21. 21.30 + 30 + 31 + 71 =
  22. 22.26 + 42 + 75 + 14 =
  23. 23.81 + 46 + 12 + 42 =
  24. 24.67 + 16 + 16 + 39 =
  25. 25.12 + 56 + 12 + 89 =
  26. 26.25 + 48 + 64 + 28 =
  27. 27.74 + 21 + 12 + 53 =
  28. 28.29 + 59 + 56 + 39 =
  29. 29.37 + 87 + 14 + 78 =
  30. 30.67 + 29 + 66 + 25 =
  31. 31.78 + 30 + 81 + 17 =
  32. 32.49 + 14 + 20 + 59 =
  33. 33.68 + 81 + 29 + 64 =
  34. 34.77 + 83 + 89 + 58 =
  35. 35.77 + 87 + 11 + 34 =
  36. 36.75 + 70 + 20 + 61 =
  37. 37.26 + 26 + 30 + 51 =
  38. 38.20 + 12 + 71 + 52 =
  39. 39.17 + 21 + 53 + 73 =
  40. 40.17 + 13 + 15 + 19 =

Answer key

  1. 248
  2. 259
  3. 104
  4. 220
  5. 172
  6. 253
  7. 227
  8. 211
  9. 198
  10. 200
  11. 186
  12. 250
  13. 150
  14. 213
  15. 224
  16. 171
  17. 219
  18. 121
  19. 145
  20. 168
  21. 162
  22. 157
  23. 181
  24. 138
  25. 169
  26. 165
  27. 160
  28. 183
  29. 216
  30. 187
  31. 206
  32. 142
  33. 242
  34. 307
  35. 209
  36. 226
  37. 133
  38. 155
  39. 164
  40. 64

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