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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 229 · 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. 1.28 × 8 =
  2. 2.145 × 4 =
  3. 3.24 × 4 =
  4. 4.51 × 4 =
  5. 5.144 × 4 =
  6. 6.44 × 4 =
  7. 7.122 × 4 =
  8. 8.26 × 8 =
  9. 9.21 × 8 =
  10. 10.37 × 4 =
  11. 11.32 × 8 =
  12. 12.23 × 4 =
  13. 13.122 × 4 =
  14. 14.12 × 8 =
  15. 15.104 × 4 =
  16. 16.12 × 8 =
  17. 17.54 × 4 =
  18. 18.63 × 4 =
  19. 19.107 × 4 =
  20. 20.50 × 8 =
  21. 21.21 × 4 =
  22. 22.56 × 8 =
  23. 23.120 × 4 =
  24. 24.16 × 4 =
  25. 25.35 × 4 =
  26. 26.113 × 4 =
  27. 27.70 × 4 =
  28. 28.54 × 4 =
  29. 29.147 × 4 =
  30. 30.154 × 4 =
  31. 31.32 × 8 =
  32. 32.57 × 8 =
  33. 33.41 × 8 =
  34. 34.122 × 4 =
  35. 35.62 × 8 =
  36. 36.75 × 8 =
  37. 37.37 × 4 =
  38. 38.56 × 8 =
  39. 39.51 × 8 =
  40. 40.69 × 8 =

Answer key

  1. 224
  2. 580
  3. 96
  4. 204
  5. 576
  6. 176
  7. 488
  8. 208
  9. 168
  10. 148
  11. 256
  12. 92
  13. 488
  14. 96
  15. 416
  16. 96
  17. 216
  18. 252
  19. 428
  20. 400
  21. 84
  22. 448
  23. 480
  24. 64
  25. 140
  26. 452
  27. 280
  28. 216
  29. 588
  30. 616
  31. 256
  32. 456
  33. 328
  34. 488
  35. 496
  36. 600
  37. 148
  38. 448
  39. 408
  40. 552

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