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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 34 · 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. 1.85 + 21 + 15 + 77 =
  2. 2.37 + 12 + 42 + 80 =
  3. 3.67 + 36 + 66 + 59 =
  4. 4.46 + 14 + 40 + 53 =
  5. 5.32 + 40 + 70 + 66 =
  6. 6.12 + 20 + 80 + 33 =
  7. 7.27 + 26 + 57 + 39 =
  8. 8.54 + 72 + 78 + 22 =
  9. 9.23 + 55 + 79 + 61 =
  10. 10.22 + 61 + 19 + 15 =
  11. 11.75 + 13 + 38 + 48 =
  12. 12.89 + 82 + 28 + 25 =
  13. 13.15 + 28 + 85 + 32 =
  14. 14.74 + 19 + 44 + 19 =
  15. 15.69 + 84 + 76 + 74 =
  16. 16.42 + 18 + 66 + 54 =
  17. 17.79 + 89 + 87 + 22 =
  18. 18.11 + 22 + 38 + 85 =
  19. 19.29 + 62 + 41 + 20 =
  20. 20.41 + 33 + 68 + 82 =
  21. 21.84 + 82 + 18 + 72 =
  22. 22.41 + 65 + 23 + 65 =
  23. 23.21 + 19 + 80 + 15 =
  24. 24.18 + 85 + 37 + 69 =
  25. 25.29 + 77 + 72 + 79 =
  26. 26.77 + 68 + 89 + 88 =
  27. 27.70 + 39 + 19 + 41 =
  28. 28.77 + 17 + 15 + 25 =
  29. 29.55 + 17 + 22 + 20 =
  30. 30.40 + 60 + 46 + 84 =
  31. 31.84 + 63 + 26 + 12 =
  32. 32.35 + 29 + 87 + 62 =
  33. 33.87 + 76 + 64 + 56 =
  34. 34.31 + 14 + 42 + 66 =
  35. 35.61 + 18 + 17 + 83 =
  36. 36.11 + 25 + 54 + 56 =
  37. 37.55 + 59 + 30 + 39 =
  38. 38.62 + 21 + 25 + 79 =
  39. 39.45 + 33 + 12 + 82 =
  40. 40.63 + 79 + 67 + 63 =

Answer key

  1. 198
  2. 171
  3. 228
  4. 153
  5. 208
  6. 145
  7. 149
  8. 226
  9. 218
  10. 117
  11. 174
  12. 224
  13. 160
  14. 156
  15. 303
  16. 180
  17. 277
  18. 156
  19. 152
  20. 224
  21. 256
  22. 194
  23. 135
  24. 209
  25. 257
  26. 322
  27. 169
  28. 134
  29. 114
  30. 230
  31. 185
  32. 213
  33. 283
  34. 153
  35. 179
  36. 146
  37. 183
  38. 187
  39. 172
  40. 272

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