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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 589 · 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. 1.126 × 4 =
  2. 2.56 × 8 =
  3. 3.73 × 8 =
  4. 4.69 × 8 =
  5. 5.73 × 4 =
  6. 6.56 × 4 =
  7. 7.63 × 8 =
  8. 8.48 × 8 =
  9. 9.89 × 4 =
  10. 10.47 × 4 =
  11. 11.99 × 4 =
  12. 12.48 × 8 =
  13. 13.30 × 8 =
  14. 14.16 × 4 =
  15. 15.61 × 8 =
  16. 16.51 × 4 =
  17. 17.138 × 4 =
  18. 18.16 × 4 =
  19. 19.46 × 4 =
  20. 20.110 × 4 =
  21. 21.139 × 4 =
  22. 22.134 × 4 =
  23. 23.18 × 8 =
  24. 24.57 × 8 =
  25. 25.96 × 4 =
  26. 26.12 × 8 =
  27. 27.63 × 8 =
  28. 28.87 × 4 =
  29. 29.37 × 8 =
  30. 30.23 × 8 =
  31. 31.12 × 8 =
  32. 32.118 × 4 =
  33. 33.111 × 4 =
  34. 34.144 × 4 =
  35. 35.130 × 4 =
  36. 36.50 × 8 =
  37. 37.85 × 4 =
  38. 38.74 × 4 =
  39. 39.74 × 8 =
  40. 40.148 × 4 =

Answer key

  1. 504
  2. 448
  3. 584
  4. 552
  5. 292
  6. 224
  7. 504
  8. 384
  9. 356
  10. 188
  11. 396
  12. 384
  13. 240
  14. 64
  15. 488
  16. 204
  17. 552
  18. 64
  19. 184
  20. 440
  21. 556
  22. 536
  23. 144
  24. 456
  25. 384
  26. 96
  27. 504
  28. 348
  29. 296
  30. 184
  31. 96
  32. 472
  33. 444
  34. 576
  35. 520
  36. 400
  37. 340
  38. 296
  39. 592
  40. 592

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