← 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 481 · 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. 1.34 × 8 =
  2. 2.65 × 4 =
  3. 3.71 × 4 =
  4. 4.48 × 4 =
  5. 5.13 × 4 =
  6. 6.27 × 4 =
  7. 7.37 × 8 =
  8. 8.20 × 8 =
  9. 9.68 × 4 =
  10. 10.19 × 8 =
  11. 11.29 × 8 =
  12. 12.18 × 8 =
  13. 13.67 × 4 =
  14. 14.75 × 4 =
  15. 15.45 × 4 =
  16. 16.14 × 4 =
  17. 17.66 × 4 =
  18. 18.21 × 4 =
  19. 19.50 × 4 =
  20. 20.24 × 4 =
  21. 21.25 × 4 =
  22. 22.37 × 4 =
  23. 23.13 × 8 =
  24. 24.33 × 8 =
  25. 25.16 × 4 =
  26. 26.23 × 8 =
  27. 27.12 × 4 =
  28. 28.64 × 4 =
  29. 29.51 × 4 =
  30. 30.40 × 8 =
  31. 31.26 × 8 =
  32. 32.18 × 4 =
  33. 33.12 × 8 =
  34. 34.21 × 8 =
  35. 35.52 × 4 =
  36. 36.32 × 8 =
  37. 37.24 × 8 =
  38. 38.61 × 4 =
  39. 39.29 × 4 =
  40. 40.56 × 4 =

Answer key

  1. 272
  2. 260
  3. 284
  4. 192
  5. 52
  6. 108
  7. 296
  8. 160
  9. 272
  10. 152
  11. 232
  12. 144
  13. 268
  14. 300
  15. 180
  16. 56
  17. 264
  18. 84
  19. 200
  20. 96
  21. 100
  22. 148
  23. 104
  24. 264
  25. 64
  26. 184
  27. 48
  28. 256
  29. 204
  30. 320
  31. 208
  32. 72
  33. 96
  34. 168
  35. 208
  36. 256
  37. 192
  38. 244
  39. 116
  40. 224

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