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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 213 · 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. 1.24 × 8 =
  2. 2.20 × 4 =
  3. 3.157 × 4 =
  4. 4.69 × 8 =
  5. 5.28 × 8 =
  6. 6.30 × 8 =
  7. 7.99 × 4 =
  8. 8.140 × 4 =
  9. 9.61 × 8 =
  10. 10.37 × 8 =
  11. 11.111 × 4 =
  12. 12.87 × 4 =
  13. 13.43 × 8 =
  14. 14.136 × 4 =
  15. 15.46 × 8 =
  16. 16.19 × 4 =
  17. 17.18 × 8 =
  18. 18.53 × 8 =
  19. 19.27 × 8 =
  20. 20.17 × 8 =
  21. 21.76 × 4 =
  22. 22.27 × 8 =
  23. 23.47 × 8 =
  24. 24.58 × 8 =
  25. 25.139 × 4 =
  26. 26.45 × 4 =
  27. 27.46 × 8 =
  28. 28.70 × 8 =
  29. 29.75 × 8 =
  30. 30.16 × 4 =
  31. 31.71 × 8 =
  32. 32.69 × 8 =
  33. 33.20 × 8 =
  34. 34.71 × 8 =
  35. 35.36 × 4 =
  36. 36.110 × 4 =
  37. 37.65 × 8 =
  38. 38.105 × 4 =
  39. 39.60 × 4 =
  40. 40.43 × 4 =

Answer key

  1. 192
  2. 80
  3. 628
  4. 552
  5. 224
  6. 240
  7. 396
  8. 560
  9. 488
  10. 296
  11. 444
  12. 348
  13. 344
  14. 544
  15. 368
  16. 76
  17. 144
  18. 424
  19. 216
  20. 136
  21. 304
  22. 216
  23. 376
  24. 464
  25. 556
  26. 180
  27. 368
  28. 560
  29. 600
  30. 64
  31. 568
  32. 552
  33. 160
  34. 568
  35. 144
  36. 440
  37. 520
  38. 420
  39. 240
  40. 172

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