← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 942 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.56 × 4 =
  2. 2.20 × 8 =
  3. 3.61 × 4 =
  4. 4.74 × 4 =
  5. 5.20 × 4 =
  6. 6.15 × 4 =
  7. 7.40 × 8 =
  8. 8.48 × 4 =
  9. 9.28 × 8 =
  10. 10.30 × 4 =
  11. 11.39 × 8 =
  12. 12.36 × 8 =
  13. 13.72 × 4 =
  14. 14.12 × 8 =
  15. 15.38 × 8 =
  16. 16.18 × 4 =
  17. 17.12 × 4 =
  18. 18.24 × 8 =
  19. 19.27 × 4 =
  20. 20.38 × 4 =
  21. 21.17 × 8 =
  22. 22.37 × 8 =
  23. 23.41 × 4 =
  24. 24.35 × 8 =
  25. 25.34 × 8 =
  26. 26.21 × 8 =
  27. 27.55 × 4 =
  28. 28.19 × 4 =
  29. 29.18 × 8 =
  30. 30.68 × 4 =
  31. 31.19 × 8 =
  32. 32.13 × 8 =
  33. 33.66 × 4 =
  34. 34.22 × 4 =
  35. 35.33 × 8 =
  36. 36.59 × 4 =
  37. 37.49 × 4 =
  38. 38.32 × 4 =
  39. 39.63 × 4 =
  40. 40.26 × 4 =

Answer key

  1. 224
  2. 160
  3. 244
  4. 296
  5. 80
  6. 60
  7. 320
  8. 192
  9. 224
  10. 120
  11. 312
  12. 288
  13. 288
  14. 96
  15. 304
  16. 72
  17. 48
  18. 192
  19. 108
  20. 152
  21. 136
  22. 296
  23. 164
  24. 280
  25. 272
  26. 168
  27. 220
  28. 76
  29. 144
  30. 272
  31. 152
  32. 104
  33. 264
  34. 88
  35. 264
  36. 236
  37. 196
  38. 128
  39. 252
  40. 104

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