← 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 739 · 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. 1.15 × 8 =
  2. 2.22 × 4 =
  3. 3.29 × 8 =
  4. 4.67 × 4 =
  5. 5.66 × 4 =
  6. 6.73 × 4 =
  7. 7.40 × 4 =
  8. 8.75 × 4 =
  9. 9.26 × 8 =
  10. 10.19 × 4 =
  11. 11.36 × 4 =
  12. 12.16 × 4 =
  13. 13.20 × 8 =
  14. 14.14 × 8 =
  15. 15.27 × 4 =
  16. 16.36 × 8 =
  17. 17.15 × 4 =
  18. 18.16 × 8 =
  19. 19.46 × 4 =
  20. 20.57 × 4 =
  21. 21.22 × 8 =
  22. 22.39 × 4 =
  23. 23.17 × 4 =
  24. 24.32 × 8 =
  25. 25.33 × 4 =
  26. 26.28 × 8 =
  27. 27.71 × 4 =
  28. 28.47 × 4 =
  29. 29.17 × 8 =
  30. 30.35 × 8 =
  31. 31.23 × 8 =
  32. 32.24 × 8 =
  33. 33.12 × 4 =
  34. 34.31 × 8 =
  35. 35.13 × 4 =
  36. 36.25 × 4 =
  37. 37.39 × 8 =
  38. 38.33 × 8 =
  39. 39.52 × 4 =
  40. 40.30 × 4 =

Answer key

  1. 120
  2. 88
  3. 232
  4. 268
  5. 264
  6. 292
  7. 160
  8. 300
  9. 208
  10. 76
  11. 144
  12. 64
  13. 160
  14. 112
  15. 108
  16. 288
  17. 60
  18. 128
  19. 184
  20. 228
  21. 176
  22. 156
  23. 68
  24. 256
  25. 132
  26. 224
  27. 284
  28. 188
  29. 136
  30. 280
  31. 184
  32. 192
  33. 48
  34. 248
  35. 52
  36. 100
  37. 312
  38. 264
  39. 208
  40. 120

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