← 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 342 · 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. 1.15 × 4 =
  2. 2.20 × 8 =
  3. 3.20 × 4 =
  4. 4.26 × 4 =
  5. 5.34 × 8 =
  6. 6.72 × 4 =
  7. 7.15 × 8 =
  8. 8.22 × 4 =
  9. 9.13 × 4 =
  10. 10.23 × 4 =
  11. 11.62 × 4 =
  12. 12.50 × 4 =
  13. 13.52 × 4 =
  14. 14.16 × 8 =
  15. 15.39 × 8 =
  16. 16.33 × 4 =
  17. 17.73 × 4 =
  18. 18.27 × 8 =
  19. 19.48 × 4 =
  20. 20.38 × 8 =
  21. 21.14 × 4 =
  22. 22.14 × 8 =
  23. 23.31 × 4 =
  24. 24.31 × 8 =
  25. 25.35 × 4 =
  26. 26.28 × 8 =
  27. 27.24 × 4 =
  28. 28.32 × 4 =
  29. 29.24 × 8 =
  30. 30.25 × 8 =
  31. 31.38 × 4 =
  32. 32.67 × 4 =
  33. 33.21 × 8 =
  34. 34.29 × 8 =
  35. 35.17 × 8 =
  36. 36.58 × 4 =
  37. 37.26 × 8 =
  38. 38.59 × 4 =
  39. 39.22 × 8 =
  40. 40.46 × 4 =

Answer key

  1. 60
  2. 160
  3. 80
  4. 104
  5. 272
  6. 288
  7. 120
  8. 88
  9. 52
  10. 92
  11. 248
  12. 200
  13. 208
  14. 128
  15. 312
  16. 132
  17. 292
  18. 216
  19. 192
  20. 304
  21. 56
  22. 112
  23. 124
  24. 248
  25. 140
  26. 224
  27. 96
  28. 128
  29. 192
  30. 200
  31. 152
  32. 268
  33. 168
  34. 232
  35. 136
  36. 232
  37. 208
  38. 236
  39. 176
  40. 184

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