← 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 272 · 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. 1.13 × 8 =
  2. 2.46 × 4 =
  3. 3.55 × 4 =
  4. 4.37 × 4 =
  5. 5.40 × 8 =
  6. 6.20 × 8 =
  7. 7.40 × 4 =
  8. 8.31 × 8 =
  9. 9.17 × 8 =
  10. 10.25 × 8 =
  11. 11.33 × 8 =
  12. 12.69 × 4 =
  13. 13.35 × 8 =
  14. 14.26 × 8 =
  15. 15.44 × 4 =
  16. 16.29 × 8 =
  17. 17.36 × 4 =
  18. 18.71 × 4 =
  19. 19.30 × 8 =
  20. 20.14 × 8 =
  21. 21.18 × 8 =
  22. 22.21 × 4 =
  23. 23.22 × 4 =
  24. 24.58 × 4 =
  25. 25.45 × 4 =
  26. 26.43 × 4 =
  27. 27.12 × 4 =
  28. 28.12 × 8 =
  29. 29.16 × 4 =
  30. 30.60 × 4 =
  31. 31.29 × 4 =
  32. 32.24 × 4 =
  33. 33.15 × 4 =
  34. 34.27 × 8 =
  35. 35.27 × 4 =
  36. 36.20 × 4 =
  37. 37.61 × 4 =
  38. 38.56 × 4 =
  39. 39.14 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 104
  2. 184
  3. 220
  4. 148
  5. 320
  6. 160
  7. 160
  8. 248
  9. 136
  10. 200
  11. 264
  12. 276
  13. 280
  14. 208
  15. 176
  16. 232
  17. 144
  18. 284
  19. 240
  20. 112
  21. 144
  22. 84
  23. 88
  24. 232
  25. 180
  26. 172
  27. 48
  28. 96
  29. 64
  30. 240
  31. 116
  32. 96
  33. 60
  34. 216
  35. 108
  36. 80
  37. 244
  38. 224
  39. 56
  40. 192

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