← 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 791 · 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. 1.53 × 4 =
  2. 2.22 × 8 =
  3. 3.17 × 8 =
  4. 4.21 × 8 =
  5. 5.72 × 4 =
  6. 6.35 × 8 =
  7. 7.28 × 8 =
  8. 8.51 × 4 =
  9. 9.24 × 8 =
  10. 10.13 × 8 =
  11. 11.29 × 8 =
  12. 12.15 × 4 =
  13. 13.13 × 4 =
  14. 14.16 × 8 =
  15. 15.24 × 4 =
  16. 16.65 × 4 =
  17. 17.39 × 8 =
  18. 18.27 × 4 =
  19. 19.37 × 8 =
  20. 20.14 × 4 =
  21. 21.33 × 8 =
  22. 22.32 × 4 =
  23. 23.55 × 4 =
  24. 24.34 × 8 =
  25. 25.73 × 4 =
  26. 26.16 × 4 =
  27. 27.32 × 8 =
  28. 28.12 × 8 =
  29. 29.49 × 4 =
  30. 30.20 × 8 =
  31. 31.30 × 4 =
  32. 32.22 × 4 =
  33. 33.59 × 4 =
  34. 34.25 × 8 =
  35. 35.67 × 4 =
  36. 36.75 × 4 =
  37. 37.31 × 8 =
  38. 38.29 × 4 =
  39. 39.15 × 8 =
  40. 40.56 × 4 =

Answer key

  1. 212
  2. 176
  3. 136
  4. 168
  5. 288
  6. 280
  7. 224
  8. 204
  9. 192
  10. 104
  11. 232
  12. 60
  13. 52
  14. 128
  15. 96
  16. 260
  17. 312
  18. 108
  19. 296
  20. 56
  21. 264
  22. 128
  23. 220
  24. 272
  25. 292
  26. 64
  27. 256
  28. 96
  29. 196
  30. 160
  31. 120
  32. 88
  33. 236
  34. 200
  35. 268
  36. 300
  37. 248
  38. 116
  39. 120
  40. 224

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