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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 504 · 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. 1.33 × 8 =
  2. 2.155 × 4 =
  3. 3.103 × 4 =
  4. 4.87 × 4 =
  5. 5.51 × 4 =
  6. 6.151 × 4 =
  7. 7.58 × 8 =
  8. 8.146 × 4 =
  9. 9.15 × 8 =
  10. 10.103 × 4 =
  11. 11.23 × 8 =
  12. 12.104 × 4 =
  13. 13.63 × 4 =
  14. 14.155 × 4 =
  15. 15.18 × 8 =
  16. 16.21 × 8 =
  17. 17.138 × 4 =
  18. 18.27 × 8 =
  19. 19.35 × 8 =
  20. 20.25 × 4 =
  21. 21.23 × 4 =
  22. 22.90 × 4 =
  23. 23.36 × 8 =
  24. 24.32 × 4 =
  25. 25.145 × 4 =
  26. 26.98 × 4 =
  27. 27.22 × 8 =
  28. 28.145 × 4 =
  29. 29.55 × 8 =
  30. 30.27 × 8 =
  31. 31.108 × 4 =
  32. 32.72 × 8 =
  33. 33.59 × 4 =
  34. 34.117 × 4 =
  35. 35.16 × 8 =
  36. 36.35 × 8 =
  37. 37.139 × 4 =
  38. 38.75 × 4 =
  39. 39.36 × 8 =
  40. 40.37 × 8 =

Answer key

  1. 264
  2. 620
  3. 412
  4. 348
  5. 204
  6. 604
  7. 464
  8. 584
  9. 120
  10. 412
  11. 184
  12. 416
  13. 252
  14. 620
  15. 144
  16. 168
  17. 552
  18. 216
  19. 280
  20. 100
  21. 92
  22. 360
  23. 288
  24. 128
  25. 580
  26. 392
  27. 176
  28. 580
  29. 440
  30. 216
  31. 432
  32. 576
  33. 236
  34. 468
  35. 128
  36. 280
  37. 556
  38. 300
  39. 288
  40. 296

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