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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 557 · 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. 1.27 × 4 =
  2. 2.40 × 8 =
  3. 3.28 × 8 =
  4. 4.21 × 8 =
  5. 5.63 × 4 =
  6. 6.56 × 4 =
  7. 7.18 × 8 =
  8. 8.37 × 4 =
  9. 9.75 × 4 =
  10. 10.12 × 4 =
  11. 11.20 × 8 =
  12. 12.44 × 4 =
  13. 13.26 × 4 =
  14. 14.15 × 8 =
  15. 15.48 × 4 =
  16. 16.60 × 4 =
  17. 17.25 × 4 =
  18. 18.36 × 4 =
  19. 19.32 × 8 =
  20. 20.29 × 8 =
  21. 21.16 × 4 =
  22. 22.70 × 4 =
  23. 23.36 × 8 =
  24. 24.37 × 8 =
  25. 25.24 × 4 =
  26. 26.22 × 4 =
  27. 27.19 × 4 =
  28. 28.14 × 8 =
  29. 29.71 × 4 =
  30. 30.73 × 4 =
  31. 31.69 × 4 =
  32. 32.25 × 8 =
  33. 33.21 × 4 =
  34. 34.33 × 8 =
  35. 35.38 × 8 =
  36. 36.38 × 4 =
  37. 37.20 × 4 =
  38. 38.17 × 8 =
  39. 39.13 × 8 =
  40. 40.39 × 4 =

Answer key

  1. 108
  2. 320
  3. 224
  4. 168
  5. 252
  6. 224
  7. 144
  8. 148
  9. 300
  10. 48
  11. 160
  12. 176
  13. 104
  14. 120
  15. 192
  16. 240
  17. 100
  18. 144
  19. 256
  20. 232
  21. 64
  22. 280
  23. 288
  24. 296
  25. 96
  26. 88
  27. 76
  28. 112
  29. 284
  30. 292
  31. 276
  32. 200
  33. 84
  34. 264
  35. 304
  36. 152
  37. 80
  38. 136
  39. 104
  40. 156

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