← 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 912 · 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. 1.29 × 4 =
  2. 2.25 × 8 =
  3. 3.28 × 8 =
  4. 4.13 × 8 =
  5. 5.16 × 4 =
  6. 6.18 × 8 =
  7. 7.58 × 4 =
  8. 8.24 × 8 =
  9. 9.40 × 4 =
  10. 10.47 × 4 =
  11. 11.22 × 8 =
  12. 12.17 × 4 =
  13. 13.34 × 8 =
  14. 14.74 × 4 =
  15. 15.24 × 4 =
  16. 16.38 × 8 =
  17. 17.72 × 4 =
  18. 18.54 × 4 =
  19. 19.26 × 4 =
  20. 20.67 × 4 =
  21. 21.73 × 4 =
  22. 22.19 × 4 =
  23. 23.32 × 4 =
  24. 24.29 × 8 =
  25. 25.31 × 8 =
  26. 26.33 × 8 =
  27. 27.36 × 8 =
  28. 28.68 × 4 =
  29. 29.18 × 4 =
  30. 30.46 × 4 =
  31. 31.22 × 4 =
  32. 32.25 × 4 =
  33. 33.64 × 4 =
  34. 34.36 × 4 =
  35. 35.21 × 8 =
  36. 36.26 × 8 =
  37. 37.14 × 4 =
  38. 38.20 × 8 =
  39. 39.38 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 116
  2. 200
  3. 224
  4. 104
  5. 64
  6. 144
  7. 232
  8. 192
  9. 160
  10. 188
  11. 176
  12. 68
  13. 272
  14. 296
  15. 96
  16. 304
  17. 288
  18. 216
  19. 104
  20. 268
  21. 292
  22. 76
  23. 128
  24. 232
  25. 248
  26. 264
  27. 288
  28. 272
  29. 72
  30. 184
  31. 88
  32. 100
  33. 256
  34. 144
  35. 168
  36. 208
  37. 56
  38. 160
  39. 152
  40. 256

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