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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 604 · 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. 1.38 + 52 + 29 + 55 =
  2. 2.22 + 69 + 52 + 33 =
  3. 3.24 + 85 + 43 + 37 =
  4. 4.82 + 80 + 33 + 69 =
  5. 5.39 + 86 + 53 + 73 =
  6. 6.23 + 76 + 52 + 62 =
  7. 7.43 + 60 + 73 + 35 =
  8. 8.71 + 30 + 36 + 37 =
  9. 9.63 + 87 + 89 + 89 =
  10. 10.33 + 59 + 19 + 14 =
  11. 11.44 + 26 + 78 + 65 =
  12. 12.24 + 34 + 68 + 27 =
  13. 13.52 + 53 + 19 + 70 =
  14. 14.65 + 87 + 32 + 60 =
  15. 15.16 + 21 + 60 + 49 =
  16. 16.69 + 43 + 32 + 28 =
  17. 17.74 + 20 + 12 + 39 =
  18. 18.30 + 58 + 27 + 48 =
  19. 19.52 + 83 + 43 + 73 =
  20. 20.23 + 37 + 32 + 89 =
  21. 21.39 + 46 + 72 + 46 =
  22. 22.12 + 54 + 63 + 80 =
  23. 23.29 + 15 + 86 + 22 =
  24. 24.15 + 41 + 89 + 25 =
  25. 25.62 + 42 + 12 + 87 =
  26. 26.28 + 76 + 64 + 60 =
  27. 27.70 + 22 + 18 + 42 =
  28. 28.83 + 65 + 80 + 60 =
  29. 29.83 + 81 + 13 + 49 =
  30. 30.72 + 85 + 24 + 25 =
  31. 31.65 + 71 + 58 + 15 =
  32. 32.79 + 49 + 82 + 62 =
  33. 33.21 + 22 + 27 + 67 =
  34. 34.39 + 45 + 42 + 46 =
  35. 35.14 + 39 + 34 + 42 =
  36. 36.37 + 16 + 83 + 17 =
  37. 37.72 + 66 + 57 + 28 =
  38. 38.25 + 59 + 28 + 80 =
  39. 39.52 + 36 + 62 + 58 =
  40. 40.45 + 14 + 80 + 69 =

Answer key

  1. 174
  2. 176
  3. 189
  4. 264
  5. 251
  6. 213
  7. 211
  8. 174
  9. 328
  10. 125
  11. 213
  12. 153
  13. 194
  14. 244
  15. 146
  16. 172
  17. 145
  18. 163
  19. 251
  20. 181
  21. 203
  22. 209
  23. 152
  24. 170
  25. 203
  26. 228
  27. 152
  28. 288
  29. 226
  30. 206
  31. 209
  32. 272
  33. 137
  34. 172
  35. 129
  36. 153
  37. 223
  38. 192
  39. 208
  40. 208

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