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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 13 · 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. 1.112 × 4 =
  2. 2.49 × 8 =
  3. 3.65 × 4 =
  4. 4.32 × 8 =
  5. 5.20 × 8 =
  6. 6.36 × 4 =
  7. 7.132 × 4 =
  8. 8.59 × 8 =
  9. 9.15 × 4 =
  10. 10.18 × 4 =
  11. 11.58 × 8 =
  12. 12.74 × 8 =
  13. 13.42 × 4 =
  14. 14.42 × 4 =
  15. 15.155 × 4 =
  16. 16.28 × 8 =
  17. 17.15 × 4 =
  18. 18.49 × 4 =
  19. 19.139 × 4 =
  20. 20.83 × 4 =
  21. 21.70 × 8 =
  22. 22.43 × 8 =
  23. 23.130 × 4 =
  24. 24.55 × 8 =
  25. 25.75 × 8 =
  26. 26.36 × 8 =
  27. 27.38 × 8 =
  28. 28.104 × 4 =
  29. 29.29 × 8 =
  30. 30.23 × 8 =
  31. 31.40 × 4 =
  32. 32.69 × 8 =
  33. 33.53 × 8 =
  34. 34.64 × 4 =
  35. 35.47 × 8 =
  36. 36.159 × 4 =
  37. 37.61 × 8 =
  38. 38.70 × 8 =
  39. 39.24 × 8 =
  40. 40.129 × 4 =

Answer key

  1. 448
  2. 392
  3. 260
  4. 256
  5. 160
  6. 144
  7. 528
  8. 472
  9. 60
  10. 72
  11. 464
  12. 592
  13. 168
  14. 168
  15. 620
  16. 224
  17. 60
  18. 196
  19. 556
  20. 332
  21. 560
  22. 344
  23. 520
  24. 440
  25. 600
  26. 288
  27. 304
  28. 416
  29. 232
  30. 184
  31. 160
  32. 552
  33. 424
  34. 256
  35. 376
  36. 636
  37. 488
  38. 560
  39. 192
  40. 516

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