← 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 837 · 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. 1.26 × 8 =
  2. 2.20 × 4 =
  3. 3.53 × 4 =
  4. 4.19 × 8 =
  5. 5.25 × 8 =
  6. 6.23 × 4 =
  7. 7.62 × 4 =
  8. 8.17 × 8 =
  9. 9.73 × 4 =
  10. 10.20 × 8 =
  11. 11.16 × 8 =
  12. 12.46 × 4 =
  13. 13.35 × 8 =
  14. 14.70 × 4 =
  15. 15.15 × 8 =
  16. 16.44 × 4 =
  17. 17.56 × 4 =
  18. 18.34 × 8 =
  19. 19.18 × 8 =
  20. 20.31 × 8 =
  21. 21.22 × 8 =
  22. 22.13 × 8 =
  23. 23.32 × 8 =
  24. 24.12 × 4 =
  25. 25.35 × 4 =
  26. 26.12 × 8 =
  27. 27.72 × 4 =
  28. 28.66 × 4 =
  29. 29.71 × 4 =
  30. 30.23 × 8 =
  31. 31.30 × 8 =
  32. 32.40 × 8 =
  33. 33.27 × 8 =
  34. 34.63 × 4 =
  35. 35.61 × 4 =
  36. 36.60 × 4 =
  37. 37.24 × 8 =
  38. 38.24 × 4 =
  39. 39.14 × 4 =
  40. 40.16 × 4 =

Answer key

  1. 208
  2. 80
  3. 212
  4. 152
  5. 200
  6. 92
  7. 248
  8. 136
  9. 292
  10. 160
  11. 128
  12. 184
  13. 280
  14. 280
  15. 120
  16. 176
  17. 224
  18. 272
  19. 144
  20. 248
  21. 176
  22. 104
  23. 256
  24. 48
  25. 140
  26. 96
  27. 288
  28. 264
  29. 284
  30. 184
  31. 240
  32. 320
  33. 216
  34. 252
  35. 244
  36. 240
  37. 192
  38. 96
  39. 56
  40. 64

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