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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 967 · 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. 1.88 × 4 =
  2. 2.48 × 8 =
  3. 3.15 × 8 =
  4. 4.31 × 4 =
  5. 5.21 × 8 =
  6. 6.79 × 4 =
  7. 7.40 × 8 =
  8. 8.103 × 4 =
  9. 9.155 × 4 =
  10. 10.26 × 4 =
  11. 11.31 × 4 =
  12. 12.62 × 4 =
  13. 13.52 × 4 =
  14. 14.44 × 8 =
  15. 15.50 × 8 =
  16. 16.18 × 4 =
  17. 17.44 × 4 =
  18. 18.55 × 8 =
  19. 19.60 × 8 =
  20. 20.145 × 4 =
  21. 21.55 × 4 =
  22. 22.126 × 4 =
  23. 23.23 × 4 =
  24. 24.52 × 8 =
  25. 25.117 × 4 =
  26. 26.131 × 4 =
  27. 27.44 × 8 =
  28. 28.54 × 8 =
  29. 29.68 × 4 =
  30. 30.75 × 8 =
  31. 31.113 × 4 =
  32. 32.101 × 4 =
  33. 33.24 × 8 =
  34. 34.112 × 4 =
  35. 35.28 × 8 =
  36. 36.21 × 8 =
  37. 37.14 × 8 =
  38. 38.36 × 8 =
  39. 39.116 × 4 =
  40. 40.41 × 8 =

Answer key

  1. 352
  2. 384
  3. 120
  4. 124
  5. 168
  6. 316
  7. 320
  8. 412
  9. 620
  10. 104
  11. 124
  12. 248
  13. 208
  14. 352
  15. 400
  16. 72
  17. 176
  18. 440
  19. 480
  20. 580
  21. 220
  22. 504
  23. 92
  24. 416
  25. 468
  26. 524
  27. 352
  28. 432
  29. 272
  30. 600
  31. 452
  32. 404
  33. 192
  34. 448
  35. 224
  36. 168
  37. 112
  38. 288
  39. 464
  40. 328

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