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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 798 · 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. 1.58 × 8 =
  2. 2.61 × 4 =
  3. 3.33 × 8 =
  4. 4.42 × 4 =
  5. 5.61 × 4 =
  6. 6.90 × 4 =
  7. 7.122 × 4 =
  8. 8.30 × 8 =
  9. 9.133 × 4 =
  10. 10.28 × 8 =
  11. 11.43 × 8 =
  12. 12.81 × 4 =
  13. 13.30 × 8 =
  14. 14.72 × 8 =
  15. 15.13 × 4 =
  16. 16.16 × 8 =
  17. 17.117 × 4 =
  18. 18.59 × 8 =
  19. 19.99 × 4 =
  20. 20.13 × 8 =
  21. 21.69 × 8 =
  22. 22.70 × 8 =
  23. 23.49 × 4 =
  24. 24.38 × 4 =
  25. 25.65 × 4 =
  26. 26.139 × 4 =
  27. 27.67 × 8 =
  28. 28.26 × 4 =
  29. 29.57 × 8 =
  30. 30.74 × 8 =
  31. 31.20 × 4 =
  32. 32.51 × 8 =
  33. 33.131 × 4 =
  34. 34.17 × 8 =
  35. 35.154 × 4 =
  36. 36.24 × 4 =
  37. 37.58 × 8 =
  38. 38.41 × 8 =
  39. 39.42 × 8 =
  40. 40.85 × 4 =

Answer key

  1. 464
  2. 244
  3. 264
  4. 168
  5. 244
  6. 360
  7. 488
  8. 240
  9. 532
  10. 224
  11. 344
  12. 324
  13. 240
  14. 576
  15. 52
  16. 128
  17. 468
  18. 472
  19. 396
  20. 104
  21. 552
  22. 560
  23. 196
  24. 152
  25. 260
  26. 556
  27. 536
  28. 104
  29. 456
  30. 592
  31. 80
  32. 408
  33. 524
  34. 136
  35. 616
  36. 96
  37. 464
  38. 328
  39. 336
  40. 340

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