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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 977 · 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. 1.23 + 23 + 23 + 79 =
  2. 2.21 + 65 + 66 + 14 =
  3. 3.61 + 68 + 12 + 87 =
  4. 4.13 + 17 + 57 + 51 =
  5. 5.83 + 67 + 78 + 82 =
  6. 6.81 + 26 + 87 + 33 =
  7. 7.45 + 67 + 89 + 53 =
  8. 8.30 + 40 + 32 + 16 =
  9. 9.19 + 80 + 65 + 23 =
  10. 10.20 + 27 + 33 + 13 =
  11. 11.23 + 25 + 32 + 26 =
  12. 12.28 + 25 + 61 + 73 =
  13. 13.20 + 35 + 31 + 29 =
  14. 14.50 + 60 + 29 + 74 =
  15. 15.37 + 35 + 16 + 16 =
  16. 16.42 + 47 + 64 + 14 =
  17. 17.16 + 11 + 86 + 34 =
  18. 18.67 + 15 + 60 + 79 =
  19. 19.64 + 39 + 19 + 51 =
  20. 20.76 + 13 + 33 + 25 =
  21. 21.45 + 47 + 25 + 86 =
  22. 22.49 + 23 + 23 + 77 =
  23. 23.28 + 40 + 50 + 62 =
  24. 24.77 + 50 + 33 + 17 =
  25. 25.54 + 21 + 14 + 54 =
  26. 26.69 + 58 + 75 + 20 =
  27. 27.78 + 49 + 68 + 31 =
  28. 28.55 + 34 + 78 + 89 =
  29. 29.83 + 88 + 26 + 17 =
  30. 30.63 + 82 + 45 + 32 =
  31. 31.26 + 86 + 46 + 17 =
  32. 32.15 + 87 + 40 + 84 =
  33. 33.32 + 22 + 22 + 72 =
  34. 34.11 + 38 + 65 + 33 =
  35. 35.22 + 31 + 33 + 39 =
  36. 36.40 + 82 + 65 + 28 =
  37. 37.73 + 40 + 79 + 26 =
  38. 38.33 + 74 + 80 + 35 =
  39. 39.24 + 55 + 24 + 47 =
  40. 40.73 + 25 + 83 + 55 =

Answer key

  1. 148
  2. 166
  3. 228
  4. 138
  5. 310
  6. 227
  7. 254
  8. 118
  9. 187
  10. 93
  11. 106
  12. 187
  13. 115
  14. 213
  15. 104
  16. 167
  17. 147
  18. 221
  19. 173
  20. 147
  21. 203
  22. 172
  23. 180
  24. 177
  25. 143
  26. 222
  27. 226
  28. 256
  29. 214
  30. 222
  31. 175
  32. 226
  33. 148
  34. 147
  35. 125
  36. 215
  37. 218
  38. 222
  39. 150
  40. 236

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