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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 45 · 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. 1.66 × 4 =
  2. 2.71 × 4 =
  3. 3.67 × 4 =
  4. 4.114 × 4 =
  5. 5.53 × 4 =
  6. 6.91 × 4 =
  7. 7.23 × 4 =
  8. 8.96 × 4 =
  9. 9.58 × 8 =
  10. 10.102 × 4 =
  11. 11.24 × 4 =
  12. 12.33 × 4 =
  13. 13.113 × 4 =
  14. 14.46 × 8 =
  15. 15.59 × 8 =
  16. 16.54 × 8 =
  17. 17.68 × 8 =
  18. 18.133 × 4 =
  19. 19.30 × 8 =
  20. 20.75 × 4 =
  21. 21.18 × 4 =
  22. 22.40 × 8 =
  23. 23.59 × 8 =
  24. 24.90 × 4 =
  25. 25.40 × 4 =
  26. 26.19 × 8 =
  27. 27.129 × 4 =
  28. 28.160 × 4 =
  29. 29.150 × 4 =
  30. 30.48 × 8 =
  31. 31.60 × 8 =
  32. 32.30 × 8 =
  33. 33.72 × 4 =
  34. 34.114 × 4 =
  35. 35.65 × 8 =
  36. 36.16 × 8 =
  37. 37.67 × 8 =
  38. 38.22 × 8 =
  39. 39.143 × 4 =
  40. 40.57 × 8 =

Answer key

  1. 264
  2. 284
  3. 268
  4. 456
  5. 212
  6. 364
  7. 92
  8. 384
  9. 464
  10. 408
  11. 96
  12. 132
  13. 452
  14. 368
  15. 472
  16. 432
  17. 544
  18. 532
  19. 240
  20. 300
  21. 72
  22. 320
  23. 472
  24. 360
  25. 160
  26. 152
  27. 516
  28. 640
  29. 600
  30. 384
  31. 480
  32. 240
  33. 288
  34. 456
  35. 520
  36. 128
  37. 536
  38. 176
  39. 572
  40. 456

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