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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 993 · 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. 1.42 × 4 =
  2. 2.24 × 8 =
  3. 3.27 × 8 =
  4. 4.111 × 4 =
  5. 5.74 × 8 =
  6. 6.147 × 4 =
  7. 7.154 × 4 =
  8. 8.152 × 4 =
  9. 9.55 × 4 =
  10. 10.51 × 8 =
  11. 11.56 × 4 =
  12. 12.32 × 8 =
  13. 13.51 × 8 =
  14. 14.40 × 8 =
  15. 15.58 × 4 =
  16. 16.134 × 4 =
  17. 17.125 × 4 =
  18. 18.93 × 4 =
  19. 19.26 × 8 =
  20. 20.133 × 4 =
  21. 21.70 × 8 =
  22. 22.38 × 8 =
  23. 23.14 × 8 =
  24. 24.72 × 8 =
  25. 25.153 × 4 =
  26. 26.158 × 4 =
  27. 27.42 × 4 =
  28. 28.75 × 4 =
  29. 29.124 × 4 =
  30. 30.44 × 4 =
  31. 31.15 × 8 =
  32. 32.63 × 8 =
  33. 33.36 × 8 =
  34. 34.14 × 8 =
  35. 35.75 × 8 =
  36. 36.139 × 4 =
  37. 37.33 × 4 =
  38. 38.66 × 4 =
  39. 39.116 × 4 =
  40. 40.77 × 4 =

Answer key

  1. 168
  2. 192
  3. 216
  4. 444
  5. 592
  6. 588
  7. 616
  8. 608
  9. 220
  10. 408
  11. 224
  12. 256
  13. 408
  14. 320
  15. 232
  16. 536
  17. 500
  18. 372
  19. 208
  20. 532
  21. 560
  22. 304
  23. 112
  24. 576
  25. 612
  26. 632
  27. 168
  28. 300
  29. 496
  30. 176
  31. 120
  32. 504
  33. 288
  34. 112
  35. 600
  36. 556
  37. 132
  38. 264
  39. 464
  40. 308

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