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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 752 · 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. 1.68 × 4 =
  2. 2.28 × 8 =
  3. 3.25 × 4 =
  4. 4.32 × 8 =
  5. 5.39 × 4 =
  6. 6.24 × 4 =
  7. 7.67 × 4 =
  8. 8.45 × 4 =
  9. 9.40 × 4 =
  10. 10.17 × 8 =
  11. 11.23 × 8 =
  12. 12.19 × 8 =
  13. 13.24 × 8 =
  14. 14.12 × 8 =
  15. 15.26 × 8 =
  16. 16.40 × 8 =
  17. 17.29 × 4 =
  18. 18.52 × 4 =
  19. 19.23 × 4 =
  20. 20.25 × 8 =
  21. 21.16 × 8 =
  22. 22.21 × 4 =
  23. 23.33 × 8 =
  24. 24.54 × 4 =
  25. 25.16 × 4 =
  26. 26.75 × 4 =
  27. 27.55 × 4 =
  28. 28.19 × 4 =
  29. 29.27 × 4 =
  30. 30.20 × 4 =
  31. 31.51 × 4 =
  32. 32.46 × 4 =
  33. 33.37 × 4 =
  34. 34.59 × 4 =
  35. 35.17 × 4 =
  36. 36.56 × 4 =
  37. 37.21 × 8 =
  38. 38.20 × 8 =
  39. 39.13 × 4 =
  40. 40.72 × 4 =

Answer key

  1. 272
  2. 224
  3. 100
  4. 256
  5. 156
  6. 96
  7. 268
  8. 180
  9. 160
  10. 136
  11. 184
  12. 152
  13. 192
  14. 96
  15. 208
  16. 320
  17. 116
  18. 208
  19. 92
  20. 200
  21. 128
  22. 84
  23. 264
  24. 216
  25. 64
  26. 300
  27. 220
  28. 76
  29. 108
  30. 80
  31. 204
  32. 184
  33. 148
  34. 236
  35. 68
  36. 224
  37. 168
  38. 160
  39. 52
  40. 288

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