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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 550 · 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. 1.33 + 20 + 89 + 67 =
  2. 2.44 + 87 + 32 + 16 =
  3. 3.65 + 48 + 61 + 21 =
  4. 4.79 + 42 + 59 + 82 =
  5. 5.48 + 62 + 60 + 20 =
  6. 6.41 + 27 + 84 + 29 =
  7. 7.84 + 81 + 11 + 27 =
  8. 8.82 + 84 + 83 + 70 =
  9. 9.36 + 50 + 67 + 31 =
  10. 10.45 + 51 + 88 + 36 =
  11. 11.19 + 35 + 78 + 42 =
  12. 12.17 + 87 + 24 + 63 =
  13. 13.39 + 26 + 82 + 14 =
  14. 14.30 + 78 + 72 + 68 =
  15. 15.56 + 35 + 19 + 49 =
  16. 16.75 + 13 + 85 + 65 =
  17. 17.81 + 63 + 18 + 27 =
  18. 18.60 + 28 + 22 + 56 =
  19. 19.78 + 52 + 50 + 77 =
  20. 20.32 + 69 + 17 + 75 =
  21. 21.40 + 14 + 16 + 13 =
  22. 22.89 + 24 + 19 + 30 =
  23. 23.40 + 28 + 29 + 15 =
  24. 24.50 + 48 + 37 + 53 =
  25. 25.29 + 19 + 30 + 82 =
  26. 26.39 + 13 + 28 + 23 =
  27. 27.56 + 31 + 49 + 61 =
  28. 28.17 + 80 + 27 + 85 =
  29. 29.51 + 23 + 59 + 49 =
  30. 30.61 + 76 + 25 + 18 =
  31. 31.12 + 43 + 17 + 51 =
  32. 32.18 + 60 + 15 + 64 =
  33. 33.56 + 68 + 30 + 49 =
  34. 34.32 + 64 + 28 + 43 =
  35. 35.86 + 48 + 77 + 81 =
  36. 36.35 + 28 + 68 + 31 =
  37. 37.81 + 85 + 23 + 32 =
  38. 38.29 + 73 + 42 + 52 =
  39. 39.21 + 13 + 78 + 44 =
  40. 40.23 + 50 + 52 + 77 =

Answer key

  1. 209
  2. 179
  3. 195
  4. 262
  5. 190
  6. 181
  7. 203
  8. 319
  9. 184
  10. 220
  11. 174
  12. 191
  13. 161
  14. 248
  15. 159
  16. 238
  17. 189
  18. 166
  19. 257
  20. 193
  21. 83
  22. 162
  23. 112
  24. 188
  25. 160
  26. 103
  27. 197
  28. 209
  29. 182
  30. 180
  31. 123
  32. 157
  33. 203
  34. 167
  35. 292
  36. 162
  37. 221
  38. 196
  39. 156
  40. 202

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