← 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 33 · 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. 1.51 × 4 =
  2. 2.47 × 4 =
  3. 3.32 × 8 =
  4. 4.28 × 8 =
  5. 5.59 × 4 =
  6. 6.32 × 4 =
  7. 7.56 × 4 =
  8. 8.35 × 8 =
  9. 9.34 × 8 =
  10. 10.63 × 4 =
  11. 11.17 × 8 =
  12. 12.18 × 4 =
  13. 13.40 × 8 =
  14. 14.17 × 4 =
  15. 15.29 × 8 =
  16. 16.37 × 8 =
  17. 17.31 × 8 =
  18. 18.22 × 8 =
  19. 19.20 × 4 =
  20. 20.75 × 4 =
  21. 21.26 × 8 =
  22. 22.24 × 8 =
  23. 23.36 × 8 =
  24. 24.70 × 4 =
  25. 25.22 × 4 =
  26. 26.41 × 4 =
  27. 27.12 × 8 =
  28. 28.24 × 4 =
  29. 29.25 × 8 =
  30. 30.45 × 4 =
  31. 31.23 × 4 =
  32. 32.29 × 4 =
  33. 33.73 × 4 =
  34. 34.34 × 4 =
  35. 35.30 × 8 =
  36. 36.23 × 8 =
  37. 37.33 × 8 =
  38. 38.43 × 4 =
  39. 39.13 × 8 =
  40. 40.33 × 4 =

Answer key

  1. 204
  2. 188
  3. 256
  4. 224
  5. 236
  6. 128
  7. 224
  8. 280
  9. 272
  10. 252
  11. 136
  12. 72
  13. 320
  14. 68
  15. 232
  16. 296
  17. 248
  18. 176
  19. 80
  20. 300
  21. 208
  22. 192
  23. 288
  24. 280
  25. 88
  26. 164
  27. 96
  28. 96
  29. 200
  30. 180
  31. 92
  32. 116
  33. 292
  34. 136
  35. 240
  36. 184
  37. 264
  38. 172
  39. 104
  40. 132

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