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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 966 · 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. 1.158 × 4 =
  2. 2.32 × 4 =
  3. 3.33 × 8 =
  4. 4.74 × 8 =
  5. 5.55 × 8 =
  6. 6.53 × 8 =
  7. 7.34 × 8 =
  8. 8.25 × 8 =
  9. 9.154 × 4 =
  10. 10.95 × 4 =
  11. 11.119 × 4 =
  12. 12.151 × 4 =
  13. 13.53 × 4 =
  14. 14.41 × 4 =
  15. 15.19 × 8 =
  16. 16.122 × 4 =
  17. 17.127 × 4 =
  18. 18.74 × 4 =
  19. 19.100 × 4 =
  20. 20.15 × 4 =
  21. 21.56 × 8 =
  22. 22.52 × 4 =
  23. 23.65 × 8 =
  24. 24.14 × 8 =
  25. 25.64 × 8 =
  26. 26.19 × 8 =
  27. 27.159 × 4 =
  28. 28.98 × 4 =
  29. 29.25 × 8 =
  30. 30.48 × 8 =
  31. 31.16 × 4 =
  32. 32.44 × 4 =
  33. 33.150 × 4 =
  34. 34.36 × 4 =
  35. 35.53 × 8 =
  36. 36.104 × 4 =
  37. 37.42 × 4 =
  38. 38.34 × 8 =
  39. 39.111 × 4 =
  40. 40.91 × 4 =

Answer key

  1. 632
  2. 128
  3. 264
  4. 592
  5. 440
  6. 424
  7. 272
  8. 200
  9. 616
  10. 380
  11. 476
  12. 604
  13. 212
  14. 164
  15. 152
  16. 488
  17. 508
  18. 296
  19. 400
  20. 60
  21. 448
  22. 208
  23. 520
  24. 112
  25. 512
  26. 152
  27. 636
  28. 392
  29. 200
  30. 384
  31. 64
  32. 176
  33. 600
  34. 144
  35. 424
  36. 416
  37. 168
  38. 272
  39. 444
  40. 364

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