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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 941 · 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. 1.46 + 71 + 74 + 32 =
  2. 2.85 + 85 + 52 + 16 =
  3. 3.83 + 81 + 55 + 53 =
  4. 4.56 + 69 + 38 + 33 =
  5. 5.42 + 12 + 60 + 20 =
  6. 6.75 + 67 + 29 + 76 =
  7. 7.87 + 33 + 18 + 12 =
  8. 8.21 + 20 + 17 + 64 =
  9. 9.83 + 81 + 79 + 58 =
  10. 10.38 + 17 + 70 + 34 =
  11. 11.80 + 76 + 52 + 28 =
  12. 12.36 + 58 + 63 + 60 =
  13. 13.73 + 29 + 16 + 61 =
  14. 14.19 + 68 + 60 + 41 =
  15. 15.78 + 88 + 28 + 22 =
  16. 16.46 + 67 + 33 + 77 =
  17. 17.56 + 88 + 69 + 63 =
  18. 18.75 + 20 + 40 + 11 =
  19. 19.55 + 20 + 18 + 46 =
  20. 20.22 + 13 + 21 + 30 =
  21. 21.44 + 66 + 79 + 29 =
  22. 22.21 + 25 + 38 + 20 =
  23. 23.16 + 49 + 37 + 45 =
  24. 24.40 + 82 + 14 + 67 =
  25. 25.16 + 46 + 59 + 54 =
  26. 26.31 + 86 + 32 + 47 =
  27. 27.47 + 27 + 83 + 15 =
  28. 28.79 + 22 + 52 + 80 =
  29. 29.42 + 70 + 73 + 25 =
  30. 30.51 + 29 + 26 + 46 =
  31. 31.59 + 80 + 78 + 75 =
  32. 32.48 + 25 + 30 + 58 =
  33. 33.26 + 59 + 71 + 33 =
  34. 34.21 + 48 + 14 + 74 =
  35. 35.61 + 27 + 52 + 18 =
  36. 36.25 + 65 + 83 + 13 =
  37. 37.30 + 70 + 32 + 65 =
  38. 38.30 + 22 + 13 + 68 =
  39. 39.58 + 73 + 67 + 83 =
  40. 40.29 + 47 + 40 + 39 =

Answer key

  1. 223
  2. 238
  3. 272
  4. 196
  5. 134
  6. 247
  7. 150
  8. 122
  9. 301
  10. 159
  11. 236
  12. 217
  13. 179
  14. 188
  15. 216
  16. 223
  17. 276
  18. 146
  19. 139
  20. 86
  21. 218
  22. 104
  23. 147
  24. 203
  25. 175
  26. 196
  27. 172
  28. 233
  29. 210
  30. 152
  31. 292
  32. 161
  33. 189
  34. 157
  35. 158
  36. 186
  37. 197
  38. 133
  39. 281
  40. 155

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