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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 933 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.85 × 4 =
  2. 2.70 × 8 =
  3. 3.36 × 8 =
  4. 4.62 × 4 =
  5. 5.132 × 4 =
  6. 6.130 × 4 =
  7. 7.22 × 8 =
  8. 8.149 × 4 =
  9. 9.14 × 8 =
  10. 10.152 × 4 =
  11. 11.43 × 8 =
  12. 12.41 × 4 =
  13. 13.51 × 4 =
  14. 14.54 × 4 =
  15. 15.133 × 4 =
  16. 16.49 × 8 =
  17. 17.54 × 4 =
  18. 18.117 × 4 =
  19. 19.25 × 8 =
  20. 20.48 × 4 =
  21. 21.62 × 4 =
  22. 22.57 × 4 =
  23. 23.104 × 4 =
  24. 24.136 × 4 =
  25. 25.28 × 4 =
  26. 26.159 × 4 =
  27. 27.17 × 4 =
  28. 28.40 × 8 =
  29. 29.28 × 8 =
  30. 30.136 × 4 =
  31. 31.26 × 8 =
  32. 32.35 × 8 =
  33. 33.26 × 8 =
  34. 34.60 × 4 =
  35. 35.19 × 8 =
  36. 36.54 × 4 =
  37. 37.42 × 8 =
  38. 38.13 × 8 =
  39. 39.23 × 8 =
  40. 40.118 × 4 =

Answer key

  1. 340
  2. 560
  3. 288
  4. 248
  5. 528
  6. 520
  7. 176
  8. 596
  9. 112
  10. 608
  11. 344
  12. 164
  13. 204
  14. 216
  15. 532
  16. 392
  17. 216
  18. 468
  19. 200
  20. 192
  21. 248
  22. 228
  23. 416
  24. 544
  25. 112
  26. 636
  27. 68
  28. 320
  29. 224
  30. 544
  31. 208
  32. 280
  33. 208
  34. 240
  35. 152
  36. 216
  37. 336
  38. 104
  39. 184
  40. 472

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