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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 609 · 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. 1.20 × 8 =
  2. 2.136 × 4 =
  3. 3.61 × 8 =
  4. 4.74 × 4 =
  5. 5.68 × 8 =
  6. 6.52 × 8 =
  7. 7.27 × 8 =
  8. 8.68 × 8 =
  9. 9.86 × 4 =
  10. 10.53 × 4 =
  11. 11.154 × 4 =
  12. 12.110 × 4 =
  13. 13.105 × 4 =
  14. 14.35 × 4 =
  15. 15.109 × 4 =
  16. 16.66 × 8 =
  17. 17.19 × 4 =
  18. 18.57 × 8 =
  19. 19.47 × 4 =
  20. 20.133 × 4 =
  21. 21.101 × 4 =
  22. 22.34 × 8 =
  23. 23.129 × 4 =
  24. 24.72 × 8 =
  25. 25.138 × 4 =
  26. 26.50 × 8 =
  27. 27.17 × 4 =
  28. 28.45 × 8 =
  29. 29.112 × 4 =
  30. 30.149 × 4 =
  31. 31.24 × 8 =
  32. 32.125 × 4 =
  33. 33.59 × 8 =
  34. 34.41 × 8 =
  35. 35.114 × 4 =
  36. 36.56 × 8 =
  37. 37.32 × 8 =
  38. 38.71 × 8 =
  39. 39.67 × 8 =
  40. 40.157 × 4 =

Answer key

  1. 160
  2. 544
  3. 488
  4. 296
  5. 544
  6. 416
  7. 216
  8. 544
  9. 344
  10. 212
  11. 616
  12. 440
  13. 420
  14. 140
  15. 436
  16. 528
  17. 76
  18. 456
  19. 188
  20. 532
  21. 404
  22. 272
  23. 516
  24. 576
  25. 552
  26. 400
  27. 68
  28. 360
  29. 448
  30. 596
  31. 192
  32. 500
  33. 472
  34. 328
  35. 456
  36. 448
  37. 256
  38. 568
  39. 536
  40. 628

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