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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 43 · 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. 1.74 × 4 =
  2. 2.22 × 8 =
  3. 3.46 × 4 =
  4. 4.65 × 4 =
  5. 5.107 × 4 =
  6. 6.41 × 4 =
  7. 7.110 × 4 =
  8. 8.119 × 4 =
  9. 9.35 × 4 =
  10. 10.37 × 4 =
  11. 11.137 × 4 =
  12. 12.130 × 4 =
  13. 13.19 × 8 =
  14. 14.119 × 4 =
  15. 15.26 × 4 =
  16. 16.25 × 4 =
  17. 17.101 × 4 =
  18. 18.21 × 8 =
  19. 19.57 × 8 =
  20. 20.122 × 4 =
  21. 21.122 × 4 =
  22. 22.159 × 4 =
  23. 23.60 × 4 =
  24. 24.52 × 4 =
  25. 25.74 × 8 =
  26. 26.72 × 8 =
  27. 27.65 × 8 =
  28. 28.150 × 4 =
  29. 29.117 × 4 =
  30. 30.151 × 4 =
  31. 31.37 × 8 =
  32. 32.43 × 8 =
  33. 33.160 × 4 =
  34. 34.31 × 8 =
  35. 35.115 × 4 =
  36. 36.155 × 4 =
  37. 37.152 × 4 =
  38. 38.71 × 4 =
  39. 39.29 × 4 =
  40. 40.50 × 8 =

Answer key

  1. 296
  2. 176
  3. 184
  4. 260
  5. 428
  6. 164
  7. 440
  8. 476
  9. 140
  10. 148
  11. 548
  12. 520
  13. 152
  14. 476
  15. 104
  16. 100
  17. 404
  18. 168
  19. 456
  20. 488
  21. 488
  22. 636
  23. 240
  24. 208
  25. 592
  26. 576
  27. 520
  28. 600
  29. 468
  30. 604
  31. 296
  32. 344
  33. 640
  34. 248
  35. 460
  36. 620
  37. 608
  38. 284
  39. 116
  40. 400

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