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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 988 · 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. 1.94 × 4 =
  2. 2.66 × 4 =
  3. 3.153 × 4 =
  4. 4.62 × 8 =
  5. 5.103 × 4 =
  6. 6.65 × 8 =
  7. 7.117 × 4 =
  8. 8.143 × 4 =
  9. 9.56 × 4 =
  10. 10.21 × 4 =
  11. 11.38 × 4 =
  12. 12.121 × 4 =
  13. 13.107 × 4 =
  14. 14.61 × 8 =
  15. 15.67 × 8 =
  16. 16.29 × 4 =
  17. 17.22 × 8 =
  18. 18.44 × 4 =
  19. 19.58 × 8 =
  20. 20.109 × 4 =
  21. 21.30 × 8 =
  22. 22.23 × 8 =
  23. 23.17 × 4 =
  24. 24.70 × 4 =
  25. 25.43 × 4 =
  26. 26.19 × 4 =
  27. 27.123 × 4 =
  28. 28.50 × 4 =
  29. 29.160 × 4 =
  30. 30.13 × 4 =
  31. 31.133 × 4 =
  32. 32.31 × 4 =
  33. 33.131 × 4 =
  34. 34.18 × 8 =
  35. 35.49 × 8 =
  36. 36.150 × 4 =
  37. 37.66 × 4 =
  38. 38.15 × 8 =
  39. 39.65 × 8 =
  40. 40.70 × 4 =

Answer key

  1. 376
  2. 264
  3. 612
  4. 496
  5. 412
  6. 520
  7. 468
  8. 572
  9. 224
  10. 84
  11. 152
  12. 484
  13. 428
  14. 488
  15. 536
  16. 116
  17. 176
  18. 176
  19. 464
  20. 436
  21. 240
  22. 184
  23. 68
  24. 280
  25. 172
  26. 76
  27. 492
  28. 200
  29. 640
  30. 52
  31. 532
  32. 124
  33. 524
  34. 144
  35. 392
  36. 600
  37. 264
  38. 120
  39. 520
  40. 280

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