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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 596 · 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. 1.13 × 4 =
  2. 2.55 × 8 =
  3. 3.19 × 8 =
  4. 4.107 × 4 =
  5. 5.16 × 4 =
  6. 6.136 × 4 =
  7. 7.142 × 4 =
  8. 8.154 × 4 =
  9. 9.101 × 4 =
  10. 10.62 × 8 =
  11. 11.71 × 8 =
  12. 12.145 × 4 =
  13. 13.154 × 4 =
  14. 14.72 × 4 =
  15. 15.56 × 4 =
  16. 16.138 × 4 =
  17. 17.94 × 4 =
  18. 18.14 × 4 =
  19. 19.71 × 8 =
  20. 20.26 × 8 =
  21. 21.151 × 4 =
  22. 22.139 × 4 =
  23. 23.62 × 8 =
  24. 24.53 × 4 =
  25. 25.64 × 8 =
  26. 26.128 × 4 =
  27. 27.28 × 8 =
  28. 28.53 × 8 =
  29. 29.106 × 4 =
  30. 30.18 × 8 =
  31. 31.76 × 4 =
  32. 32.70 × 8 =
  33. 33.20 × 8 =
  34. 34.101 × 4 =
  35. 35.68 × 8 =
  36. 36.122 × 4 =
  37. 37.98 × 4 =
  38. 38.95 × 4 =
  39. 39.19 × 4 =
  40. 40.66 × 4 =

Answer key

  1. 52
  2. 440
  3. 152
  4. 428
  5. 64
  6. 544
  7. 568
  8. 616
  9. 404
  10. 496
  11. 568
  12. 580
  13. 616
  14. 288
  15. 224
  16. 552
  17. 376
  18. 56
  19. 568
  20. 208
  21. 604
  22. 556
  23. 496
  24. 212
  25. 512
  26. 512
  27. 224
  28. 424
  29. 424
  30. 144
  31. 304
  32. 560
  33. 160
  34. 404
  35. 544
  36. 488
  37. 392
  38. 380
  39. 76
  40. 264

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