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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 61 · 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. 1.89 × 4 =
  2. 2.60 × 8 =
  3. 3.27 × 8 =
  4. 4.53 × 4 =
  5. 5.95 × 4 =
  6. 6.56 × 8 =
  7. 7.35 × 8 =
  8. 8.55 × 8 =
  9. 9.14 × 8 =
  10. 10.29 × 8 =
  11. 11.72 × 8 =
  12. 12.135 × 4 =
  13. 13.43 × 8 =
  14. 14.52 × 4 =
  15. 15.27 × 8 =
  16. 16.35 × 8 =
  17. 17.115 × 4 =
  18. 18.71 × 4 =
  19. 19.19 × 4 =
  20. 20.138 × 4 =
  21. 21.34 × 4 =
  22. 22.67 × 8 =
  23. 23.20 × 8 =
  24. 24.24 × 8 =
  25. 25.88 × 4 =
  26. 26.29 × 4 =
  27. 27.60 × 8 =
  28. 28.145 × 4 =
  29. 29.92 × 4 =
  30. 30.153 × 4 =
  31. 31.18 × 8 =
  32. 32.64 × 8 =
  33. 33.63 × 8 =
  34. 34.57 × 8 =
  35. 35.130 × 4 =
  36. 36.57 × 8 =
  37. 37.21 × 4 =
  38. 38.51 × 8 =
  39. 39.154 × 4 =
  40. 40.40 × 4 =

Answer key

  1. 356
  2. 480
  3. 216
  4. 212
  5. 380
  6. 448
  7. 280
  8. 440
  9. 112
  10. 232
  11. 576
  12. 540
  13. 344
  14. 208
  15. 216
  16. 280
  17. 460
  18. 284
  19. 76
  20. 552
  21. 136
  22. 536
  23. 160
  24. 192
  25. 352
  26. 116
  27. 480
  28. 580
  29. 368
  30. 612
  31. 144
  32. 512
  33. 504
  34. 456
  35. 520
  36. 456
  37. 84
  38. 408
  39. 616
  40. 160

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