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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 976 · 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. 1.139 × 4 =
  2. 2.121 × 4 =
  3. 3.16 × 8 =
  4. 4.53 × 8 =
  5. 5.44 × 4 =
  6. 6.23 × 8 =
  7. 7.65 × 8 =
  8. 8.50 × 8 =
  9. 9.152 × 4 =
  10. 10.14 × 8 =
  11. 11.43 × 4 =
  12. 12.75 × 4 =
  13. 13.27 × 4 =
  14. 14.13 × 8 =
  15. 15.35 × 8 =
  16. 16.132 × 4 =
  17. 17.13 × 8 =
  18. 18.128 × 4 =
  19. 19.35 × 8 =
  20. 20.14 × 8 =
  21. 21.41 × 4 =
  22. 22.42 × 8 =
  23. 23.103 × 4 =
  24. 24.25 × 8 =
  25. 25.108 × 4 =
  26. 26.16 × 4 =
  27. 27.26 × 8 =
  28. 28.144 × 4 =
  29. 29.56 × 4 =
  30. 30.98 × 4 =
  31. 31.143 × 4 =
  32. 32.159 × 4 =
  33. 33.145 × 4 =
  34. 34.67 × 4 =
  35. 35.58 × 4 =
  36. 36.65 × 8 =
  37. 37.33 × 4 =
  38. 38.22 × 8 =
  39. 39.25 × 4 =
  40. 40.36 × 8 =

Answer key

  1. 556
  2. 484
  3. 128
  4. 424
  5. 176
  6. 184
  7. 520
  8. 400
  9. 608
  10. 112
  11. 172
  12. 300
  13. 108
  14. 104
  15. 280
  16. 528
  17. 104
  18. 512
  19. 280
  20. 112
  21. 164
  22. 336
  23. 412
  24. 200
  25. 432
  26. 64
  27. 208
  28. 576
  29. 224
  30. 392
  31. 572
  32. 636
  33. 580
  34. 268
  35. 232
  36. 520
  37. 132
  38. 176
  39. 100
  40. 288

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