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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 987 · 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. 1.56 × 8 =
  2. 2.62 × 4 =
  3. 3.14 × 8 =
  4. 4.14 × 4 =
  5. 5.86 × 4 =
  6. 6.132 × 4 =
  7. 7.150 × 4 =
  8. 8.15 × 8 =
  9. 9.24 × 4 =
  10. 10.22 × 8 =
  11. 11.156 × 4 =
  12. 12.21 × 4 =
  13. 13.155 × 4 =
  14. 14.46 × 8 =
  15. 15.53 × 4 =
  16. 16.119 × 4 =
  17. 17.40 × 4 =
  18. 18.59 × 8 =
  19. 19.59 × 8 =
  20. 20.100 × 4 =
  21. 21.143 × 4 =
  22. 22.33 × 8 =
  23. 23.20 × 8 =
  24. 24.48 × 8 =
  25. 25.56 × 4 =
  26. 26.103 × 4 =
  27. 27.72 × 4 =
  28. 28.114 × 4 =
  29. 29.116 × 4 =
  30. 30.21 × 4 =
  31. 31.85 × 4 =
  32. 32.87 × 4 =
  33. 33.24 × 4 =
  34. 34.142 × 4 =
  35. 35.155 × 4 =
  36. 36.41 × 8 =
  37. 37.59 × 4 =
  38. 38.34 × 8 =
  39. 39.38 × 8 =
  40. 40.41 × 8 =

Answer key

  1. 448
  2. 248
  3. 112
  4. 56
  5. 344
  6. 528
  7. 600
  8. 120
  9. 96
  10. 176
  11. 624
  12. 84
  13. 620
  14. 368
  15. 212
  16. 476
  17. 160
  18. 472
  19. 472
  20. 400
  21. 572
  22. 264
  23. 160
  24. 384
  25. 224
  26. 412
  27. 288
  28. 456
  29. 464
  30. 84
  31. 340
  32. 348
  33. 96
  34. 568
  35. 620
  36. 328
  37. 236
  38. 272
  39. 304
  40. 328

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