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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 423 · 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. 1.132 × 4 =
  2. 2.24 × 8 =
  3. 3.45 × 4 =
  4. 4.14 × 4 =
  5. 5.64 × 8 =
  6. 6.72 × 8 =
  7. 7.13 × 8 =
  8. 8.53 × 8 =
  9. 9.131 × 4 =
  10. 10.59 × 4 =
  11. 11.40 × 4 =
  12. 12.117 × 4 =
  13. 13.134 × 4 =
  14. 14.130 × 4 =
  15. 15.18 × 4 =
  16. 16.138 × 4 =
  17. 17.22 × 8 =
  18. 18.17 × 8 =
  19. 19.128 × 4 =
  20. 20.20 × 8 =
  21. 21.29 × 4 =
  22. 22.87 × 4 =
  23. 23.52 × 4 =
  24. 24.52 × 8 =
  25. 25.59 × 8 =
  26. 26.17 × 8 =
  27. 27.74 × 8 =
  28. 28.37 × 8 =
  29. 29.67 × 8 =
  30. 30.74 × 8 =
  31. 31.53 × 4 =
  32. 32.18 × 8 =
  33. 33.18 × 8 =
  34. 34.95 × 4 =
  35. 35.91 × 4 =
  36. 36.28 × 8 =
  37. 37.64 × 8 =
  38. 38.124 × 4 =
  39. 39.147 × 4 =
  40. 40.59 × 8 =

Answer key

  1. 528
  2. 192
  3. 180
  4. 56
  5. 512
  6. 576
  7. 104
  8. 424
  9. 524
  10. 236
  11. 160
  12. 468
  13. 536
  14. 520
  15. 72
  16. 552
  17. 176
  18. 136
  19. 512
  20. 160
  21. 116
  22. 348
  23. 208
  24. 416
  25. 472
  26. 136
  27. 592
  28. 296
  29. 536
  30. 592
  31. 212
  32. 144
  33. 144
  34. 380
  35. 364
  36. 224
  37. 512
  38. 496
  39. 588
  40. 472

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