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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 921 · 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. 1.145 × 4 =
  2. 2.24 × 8 =
  3. 3.145 × 4 =
  4. 4.68 × 8 =
  5. 5.154 × 4 =
  6. 6.141 × 4 =
  7. 7.124 × 4 =
  8. 8.31 × 4 =
  9. 9.24 × 8 =
  10. 10.67 × 4 =
  11. 11.36 × 8 =
  12. 12.65 × 8 =
  13. 13.67 × 8 =
  14. 14.128 × 4 =
  15. 15.152 × 4 =
  16. 16.94 × 4 =
  17. 17.115 × 4 =
  18. 18.50 × 8 =
  19. 19.20 × 8 =
  20. 20.56 × 8 =
  21. 21.29 × 8 =
  22. 22.98 × 4 =
  23. 23.139 × 4 =
  24. 24.70 × 8 =
  25. 25.95 × 4 =
  26. 26.14 × 4 =
  27. 27.36 × 8 =
  28. 28.139 × 4 =
  29. 29.32 × 8 =
  30. 30.101 × 4 =
  31. 31.74 × 8 =
  32. 32.152 × 4 =
  33. 33.67 × 8 =
  34. 34.29 × 8 =
  35. 35.53 × 8 =
  36. 36.132 × 4 =
  37. 37.159 × 4 =
  38. 38.36 × 8 =
  39. 39.69 × 8 =
  40. 40.56 × 4 =

Answer key

  1. 580
  2. 192
  3. 580
  4. 544
  5. 616
  6. 564
  7. 496
  8. 124
  9. 192
  10. 268
  11. 288
  12. 520
  13. 536
  14. 512
  15. 608
  16. 376
  17. 460
  18. 400
  19. 160
  20. 448
  21. 232
  22. 392
  23. 556
  24. 560
  25. 380
  26. 56
  27. 288
  28. 556
  29. 256
  30. 404
  31. 592
  32. 608
  33. 536
  34. 232
  35. 424
  36. 528
  37. 636
  38. 288
  39. 552
  40. 224

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