← Doubling sprints: × 4 and × 8 lesson New set →

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 110 · 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. 1.126 × 4 =
  2. 2.16 × 4 =
  3. 3.75 × 8 =
  4. 4.28 × 8 =
  5. 5.24 × 8 =
  6. 6.67 × 8 =
  7. 7.40 × 8 =
  8. 8.69 × 8 =
  9. 9.17 × 4 =
  10. 10.116 × 4 =
  11. 11.66 × 8 =
  12. 12.47 × 4 =
  13. 13.79 × 4 =
  14. 14.156 × 4 =
  15. 15.61 × 4 =
  16. 16.111 × 4 =
  17. 17.105 × 4 =
  18. 18.147 × 4 =
  19. 19.53 × 8 =
  20. 20.99 × 4 =
  21. 21.67 × 8 =
  22. 22.20 × 4 =
  23. 23.41 × 8 =
  24. 24.23 × 8 =
  25. 25.104 × 4 =
  26. 26.37 × 4 =
  27. 27.45 × 4 =
  28. 28.13 × 4 =
  29. 29.65 × 8 =
  30. 30.61 × 4 =
  31. 31.22 × 8 =
  32. 32.137 × 4 =
  33. 33.113 × 4 =
  34. 34.36 × 8 =
  35. 35.49 × 4 =
  36. 36.16 × 8 =
  37. 37.109 × 4 =
  38. 38.50 × 8 =
  39. 39.70 × 8 =
  40. 40.66 × 8 =

Answer key

  1. 504
  2. 64
  3. 600
  4. 224
  5. 192
  6. 536
  7. 320
  8. 552
  9. 68
  10. 464
  11. 528
  12. 188
  13. 316
  14. 624
  15. 244
  16. 444
  17. 420
  18. 588
  19. 424
  20. 396
  21. 536
  22. 80
  23. 328
  24. 184
  25. 416
  26. 148
  27. 180
  28. 52
  29. 520
  30. 244
  31. 176
  32. 548
  33. 452
  34. 288
  35. 196
  36. 128
  37. 436
  38. 400
  39. 560
  40. 528

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths