← 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 892 · 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. 1.55 × 4 =
  2. 2.35 × 8 =
  3. 3.22 × 4 =
  4. 4.62 × 4 =
  5. 5.25 × 8 =
  6. 6.45 × 4 =
  7. 7.32 × 8 =
  8. 8.20 × 8 =
  9. 9.23 × 8 =
  10. 10.30 × 8 =
  11. 11.34 × 8 =
  12. 12.65 × 4 =
  13. 13.60 × 4 =
  14. 14.28 × 4 =
  15. 15.50 × 4 =
  16. 16.31 × 8 =
  17. 17.40 × 8 =
  18. 18.48 × 4 =
  19. 19.12 × 8 =
  20. 20.72 × 4 =
  21. 21.21 × 8 =
  22. 22.51 × 4 =
  23. 23.17 × 8 =
  24. 24.17 × 4 =
  25. 25.26 × 4 =
  26. 26.21 × 4 =
  27. 27.38 × 8 =
  28. 28.46 × 4 =
  29. 29.66 × 4 =
  30. 30.13 × 8 =
  31. 31.40 × 4 =
  32. 32.26 × 8 =
  33. 33.27 × 8 =
  34. 34.36 × 4 =
  35. 35.19 × 8 =
  36. 36.73 × 4 =
  37. 37.12 × 4 =
  38. 38.18 × 8 =
  39. 39.16 × 8 =
  40. 40.37 × 4 =

Answer key

  1. 220
  2. 280
  3. 88
  4. 248
  5. 200
  6. 180
  7. 256
  8. 160
  9. 184
  10. 240
  11. 272
  12. 260
  13. 240
  14. 112
  15. 200
  16. 248
  17. 320
  18. 192
  19. 96
  20. 288
  21. 168
  22. 204
  23. 136
  24. 68
  25. 104
  26. 84
  27. 304
  28. 184
  29. 264
  30. 104
  31. 160
  32. 208
  33. 216
  34. 144
  35. 152
  36. 292
  37. 48
  38. 144
  39. 128
  40. 148

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