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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 501 · 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. 1.15 + 25 + 43 + 17 =
  2. 2.76 + 87 + 23 + 80 =
  3. 3.75 + 22 + 63 + 21 =
  4. 4.13 + 37 + 69 + 73 =
  5. 5.48 + 80 + 17 + 83 =
  6. 6.37 + 67 + 62 + 17 =
  7. 7.75 + 22 + 16 + 66 =
  8. 8.75 + 59 + 43 + 51 =
  9. 9.13 + 33 + 39 + 38 =
  10. 10.55 + 87 + 26 + 15 =
  11. 11.54 + 45 + 59 + 78 =
  12. 12.18 + 68 + 39 + 14 =
  13. 13.49 + 65 + 58 + 18 =
  14. 14.14 + 81 + 32 + 64 =
  15. 15.25 + 48 + 60 + 28 =
  16. 16.75 + 11 + 44 + 53 =
  17. 17.31 + 30 + 18 + 66 =
  18. 18.68 + 15 + 29 + 53 =
  19. 19.40 + 17 + 22 + 60 =
  20. 20.48 + 19 + 27 + 53 =
  21. 21.15 + 42 + 33 + 34 =
  22. 22.41 + 78 + 69 + 32 =
  23. 23.35 + 29 + 85 + 74 =
  24. 24.31 + 47 + 76 + 33 =
  25. 25.32 + 60 + 62 + 58 =
  26. 26.50 + 53 + 51 + 67 =
  27. 27.56 + 29 + 38 + 23 =
  28. 28.63 + 45 + 61 + 11 =
  29. 29.83 + 75 + 60 + 15 =
  30. 30.12 + 32 + 83 + 14 =
  31. 31.13 + 64 + 54 + 83 =
  32. 32.22 + 88 + 22 + 13 =
  33. 33.63 + 32 + 60 + 14 =
  34. 34.77 + 42 + 27 + 17 =
  35. 35.33 + 16 + 20 + 82 =
  36. 36.25 + 75 + 63 + 67 =
  37. 37.62 + 71 + 46 + 27 =
  38. 38.77 + 23 + 32 + 24 =
  39. 39.66 + 80 + 82 + 64 =
  40. 40.26 + 63 + 83 + 39 =

Answer key

  1. 100
  2. 266
  3. 181
  4. 192
  5. 228
  6. 183
  7. 179
  8. 228
  9. 123
  10. 183
  11. 236
  12. 139
  13. 190
  14. 191
  15. 161
  16. 183
  17. 145
  18. 165
  19. 139
  20. 147
  21. 124
  22. 220
  23. 223
  24. 187
  25. 212
  26. 221
  27. 146
  28. 180
  29. 233
  30. 141
  31. 214
  32. 145
  33. 169
  34. 163
  35. 151
  36. 230
  37. 206
  38. 156
  39. 292
  40. 211

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