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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 964 · 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. 1.29 × 8 =
  2. 2.28 × 8 =
  3. 3.70 × 8 =
  4. 4.23 × 4 =
  5. 5.109 × 4 =
  6. 6.142 × 4 =
  7. 7.62 × 8 =
  8. 8.35 × 8 =
  9. 9.95 × 4 =
  10. 10.59 × 8 =
  11. 11.40 × 8 =
  12. 12.41 × 4 =
  13. 13.74 × 8 =
  14. 14.30 × 8 =
  15. 15.145 × 4 =
  16. 16.38 × 4 =
  17. 17.134 × 4 =
  18. 18.134 × 4 =
  19. 19.74 × 8 =
  20. 20.12 × 8 =
  21. 21.65 × 4 =
  22. 22.150 × 4 =
  23. 23.16 × 4 =
  24. 24.24 × 8 =
  25. 25.18 × 8 =
  26. 26.27 × 4 =
  27. 27.26 × 8 =
  28. 28.156 × 4 =
  29. 29.55 × 8 =
  30. 30.41 × 4 =
  31. 31.66 × 8 =
  32. 32.75 × 4 =
  33. 33.147 × 4 =
  34. 34.44 × 4 =
  35. 35.57 × 4 =
  36. 36.70 × 4 =
  37. 37.33 × 8 =
  38. 38.97 × 4 =
  39. 39.46 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 232
  2. 224
  3. 560
  4. 92
  5. 436
  6. 568
  7. 496
  8. 280
  9. 380
  10. 472
  11. 320
  12. 164
  13. 592
  14. 240
  15. 580
  16. 152
  17. 536
  18. 536
  19. 592
  20. 96
  21. 260
  22. 600
  23. 64
  24. 192
  25. 144
  26. 108
  27. 208
  28. 624
  29. 440
  30. 164
  31. 528
  32. 300
  33. 588
  34. 176
  35. 228
  36. 280
  37. 264
  38. 388
  39. 184
  40. 56

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