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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 914 · 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. 1.42 × 8 =
  2. 2.31 × 8 =
  3. 3.34 × 8 =
  4. 4.106 × 4 =
  5. 5.110 × 4 =
  6. 6.38 × 4 =
  7. 7.15 × 4 =
  8. 8.86 × 4 =
  9. 9.82 × 4 =
  10. 10.51 × 8 =
  11. 11.76 × 4 =
  12. 12.62 × 8 =
  13. 13.114 × 4 =
  14. 14.132 × 4 =
  15. 15.15 × 8 =
  16. 16.30 × 8 =
  17. 17.22 × 8 =
  18. 18.12 × 8 =
  19. 19.58 × 8 =
  20. 20.56 × 8 =
  21. 21.44 × 8 =
  22. 22.129 × 4 =
  23. 23.95 × 4 =
  24. 24.112 × 4 =
  25. 25.141 × 4 =
  26. 26.27 × 8 =
  27. 27.23 × 8 =
  28. 28.35 × 8 =
  29. 29.85 × 4 =
  30. 30.63 × 8 =
  31. 31.83 × 4 =
  32. 32.48 × 8 =
  33. 33.50 × 8 =
  34. 34.36 × 8 =
  35. 35.17 × 4 =
  36. 36.85 × 4 =
  37. 37.16 × 8 =
  38. 38.154 × 4 =
  39. 39.132 × 4 =
  40. 40.40 × 4 =

Answer key

  1. 336
  2. 248
  3. 272
  4. 424
  5. 440
  6. 152
  7. 60
  8. 344
  9. 328
  10. 408
  11. 304
  12. 496
  13. 456
  14. 528
  15. 120
  16. 240
  17. 176
  18. 96
  19. 464
  20. 448
  21. 352
  22. 516
  23. 380
  24. 448
  25. 564
  26. 216
  27. 184
  28. 280
  29. 340
  30. 504
  31. 332
  32. 384
  33. 400
  34. 288
  35. 68
  36. 340
  37. 128
  38. 616
  39. 528
  40. 160

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