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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 457 · 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 × 4 =
  2. 2.38 × 8 =
  3. 3.53 × 4 =
  4. 4.135 × 4 =
  5. 5.20 × 8 =
  6. 6.137 × 4 =
  7. 7.20 × 8 =
  8. 8.37 × 8 =
  9. 9.24 × 8 =
  10. 10.26 × 4 =
  11. 11.13 × 8 =
  12. 12.113 × 4 =
  13. 13.70 × 8 =
  14. 14.46 × 8 =
  15. 15.51 × 8 =
  16. 16.28 × 8 =
  17. 17.158 × 4 =
  18. 18.68 × 4 =
  19. 19.15 × 8 =
  20. 20.45 × 8 =
  21. 21.115 × 4 =
  22. 22.65 × 4 =
  23. 23.50 × 8 =
  24. 24.74 × 8 =
  25. 25.107 × 4 =
  26. 26.28 × 8 =
  27. 27.50 × 4 =
  28. 28.65 × 8 =
  29. 29.30 × 4 =
  30. 30.98 × 4 =
  31. 31.38 × 4 =
  32. 32.84 × 4 =
  33. 33.43 × 8 =
  34. 34.32 × 8 =
  35. 35.31 × 4 =
  36. 36.114 × 4 =
  37. 37.72 × 8 =
  38. 38.126 × 4 =
  39. 39.23 × 8 =
  40. 40.157 × 4 =

Answer key

  1. 168
  2. 304
  3. 212
  4. 540
  5. 160
  6. 548
  7. 160
  8. 296
  9. 192
  10. 104
  11. 104
  12. 452
  13. 560
  14. 368
  15. 408
  16. 224
  17. 632
  18. 272
  19. 120
  20. 360
  21. 460
  22. 260
  23. 400
  24. 592
  25. 428
  26. 224
  27. 200
  28. 520
  29. 120
  30. 392
  31. 152
  32. 336
  33. 344
  34. 256
  35. 124
  36. 456
  37. 576
  38. 504
  39. 184
  40. 628

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