← 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 857 · 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. 1.43 × 4 =
  2. 2.35 × 4 =
  3. 3.38 × 8 =
  4. 4.22 × 4 =
  5. 5.51 × 4 =
  6. 6.15 × 4 =
  7. 7.17 × 4 =
  8. 8.40 × 8 =
  9. 9.35 × 8 =
  10. 10.37 × 8 =
  11. 11.62 × 4 =
  12. 12.38 × 4 =
  13. 13.20 × 8 =
  14. 14.36 × 8 =
  15. 15.53 × 4 =
  16. 16.39 × 8 =
  17. 17.13 × 4 =
  18. 18.45 × 4 =
  19. 19.19 × 8 =
  20. 20.18 × 4 =
  21. 21.36 × 4 =
  22. 22.47 × 4 =
  23. 23.16 × 4 =
  24. 24.49 × 4 =
  25. 25.54 × 4 =
  26. 26.23 × 8 =
  27. 27.33 × 8 =
  28. 28.20 × 4 =
  29. 29.14 × 4 =
  30. 30.17 × 8 =
  31. 31.24 × 8 =
  32. 32.14 × 8 =
  33. 33.27 × 8 =
  34. 34.34 × 8 =
  35. 35.34 × 4 =
  36. 36.75 × 4 =
  37. 37.28 × 4 =
  38. 38.61 × 4 =
  39. 39.32 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 172
  2. 140
  3. 304
  4. 88
  5. 204
  6. 60
  7. 68
  8. 320
  9. 280
  10. 296
  11. 248
  12. 152
  13. 160
  14. 288
  15. 212
  16. 312
  17. 52
  18. 180
  19. 152
  20. 72
  21. 144
  22. 188
  23. 64
  24. 196
  25. 216
  26. 184
  27. 264
  28. 80
  29. 56
  30. 136
  31. 192
  32. 112
  33. 216
  34. 272
  35. 136
  36. 300
  37. 112
  38. 244
  39. 128
  40. 184

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