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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 555 · 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. 1.74 + 64 + 23 + 87 =
  2. 2.35 + 18 + 16 + 89 =
  3. 3.27 + 16 + 20 + 63 =
  4. 4.53 + 12 + 13 + 40 =
  5. 5.18 + 78 + 30 + 63 =
  6. 6.78 + 33 + 46 + 70 =
  7. 7.39 + 87 + 49 + 51 =
  8. 8.75 + 54 + 12 + 85 =
  9. 9.73 + 88 + 25 + 39 =
  10. 10.21 + 42 + 16 + 24 =
  11. 11.72 + 19 + 39 + 68 =
  12. 12.51 + 88 + 21 + 22 =
  13. 13.89 + 73 + 77 + 67 =
  14. 14.42 + 61 + 32 + 15 =
  15. 15.38 + 41 + 27 + 11 =
  16. 16.57 + 35 + 25 + 65 =
  17. 17.83 + 75 + 34 + 15 =
  18. 18.89 + 22 + 13 + 76 =
  19. 19.88 + 18 + 41 + 13 =
  20. 20.32 + 50 + 67 + 48 =
  21. 21.46 + 21 + 28 + 14 =
  22. 22.17 + 87 + 51 + 12 =
  23. 23.12 + 56 + 58 + 55 =
  24. 24.34 + 19 + 78 + 70 =
  25. 25.43 + 45 + 87 + 48 =
  26. 26.11 + 21 + 17 + 87 =
  27. 27.60 + 21 + 26 + 28 =
  28. 28.57 + 47 + 42 + 24 =
  29. 29.76 + 53 + 31 + 47 =
  30. 30.17 + 67 + 87 + 12 =
  31. 31.23 + 46 + 42 + 15 =
  32. 32.36 + 37 + 24 + 25 =
  33. 33.15 + 64 + 69 + 18 =
  34. 34.49 + 67 + 57 + 74 =
  35. 35.26 + 76 + 15 + 11 =
  36. 36.40 + 16 + 52 + 37 =
  37. 37.53 + 41 + 69 + 33 =
  38. 38.87 + 28 + 58 + 62 =
  39. 39.20 + 61 + 46 + 78 =
  40. 40.57 + 36 + 31 + 43 =

Answer key

  1. 248
  2. 158
  3. 126
  4. 118
  5. 189
  6. 227
  7. 226
  8. 226
  9. 225
  10. 103
  11. 198
  12. 182
  13. 306
  14. 150
  15. 117
  16. 182
  17. 207
  18. 200
  19. 160
  20. 197
  21. 109
  22. 167
  23. 181
  24. 201
  25. 223
  26. 136
  27. 135
  28. 170
  29. 207
  30. 183
  31. 126
  32. 122
  33. 166
  34. 247
  35. 128
  36. 145
  37. 196
  38. 235
  39. 205
  40. 167

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