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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 776 · 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. 1.51 × 8 =
  2. 2.91 × 4 =
  3. 3.47 × 4 =
  4. 4.56 × 8 =
  5. 5.99 × 4 =
  6. 6.115 × 4 =
  7. 7.138 × 4 =
  8. 8.37 × 4 =
  9. 9.63 × 8 =
  10. 10.82 × 4 =
  11. 11.19 × 8 =
  12. 12.62 × 8 =
  13. 13.32 × 8 =
  14. 14.64 × 8 =
  15. 15.48 × 8 =
  16. 16.138 × 4 =
  17. 17.64 × 4 =
  18. 18.16 × 8 =
  19. 19.157 × 4 =
  20. 20.106 × 4 =
  21. 21.63 × 4 =
  22. 22.82 × 4 =
  23. 23.150 × 4 =
  24. 24.13 × 8 =
  25. 25.146 × 4 =
  26. 26.32 × 4 =
  27. 27.62 × 4 =
  28. 28.57 × 8 =
  29. 29.44 × 8 =
  30. 30.119 × 4 =
  31. 31.53 × 4 =
  32. 32.54 × 4 =
  33. 33.67 × 8 =
  34. 34.152 × 4 =
  35. 35.53 × 4 =
  36. 36.68 × 8 =
  37. 37.115 × 4 =
  38. 38.22 × 8 =
  39. 39.36 × 8 =
  40. 40.53 × 4 =

Answer key

  1. 408
  2. 364
  3. 188
  4. 448
  5. 396
  6. 460
  7. 552
  8. 148
  9. 504
  10. 328
  11. 152
  12. 496
  13. 256
  14. 512
  15. 384
  16. 552
  17. 256
  18. 128
  19. 628
  20. 424
  21. 252
  22. 328
  23. 600
  24. 104
  25. 584
  26. 128
  27. 248
  28. 456
  29. 352
  30. 476
  31. 212
  32. 216
  33. 536
  34. 608
  35. 212
  36. 544
  37. 460
  38. 176
  39. 288
  40. 212

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