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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 438 · 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. 1.32 × 8 =
  2. 2.22 × 4 =
  3. 3.50 × 4 =
  4. 4.39 × 8 =
  5. 5.63 × 4 =
  6. 6.58 × 4 =
  7. 7.35 × 8 =
  8. 8.28 × 8 =
  9. 9.34 × 4 =
  10. 10.15 × 8 =
  11. 11.16 × 8 =
  12. 12.22 × 8 =
  13. 13.27 × 4 =
  14. 14.29 × 8 =
  15. 15.16 × 4 =
  16. 16.41 × 4 =
  17. 17.34 × 8 =
  18. 18.21 × 8 =
  19. 19.35 × 4 =
  20. 20.24 × 4 =
  21. 21.28 × 4 =
  22. 22.36 × 4 =
  23. 23.25 × 8 =
  24. 24.30 × 4 =
  25. 25.21 × 4 =
  26. 26.19 × 8 =
  27. 27.24 × 8 =
  28. 28.18 × 8 =
  29. 29.33 × 4 =
  30. 30.66 × 4 =
  31. 31.75 × 4 =
  32. 32.14 × 4 =
  33. 33.30 × 8 =
  34. 34.37 × 4 =
  35. 35.33 × 8 =
  36. 36.70 × 4 =
  37. 37.54 × 4 =
  38. 38.20 × 8 =
  39. 39.12 × 8 =
  40. 40.20 × 4 =

Answer key

  1. 256
  2. 88
  3. 200
  4. 312
  5. 252
  6. 232
  7. 280
  8. 224
  9. 136
  10. 120
  11. 128
  12. 176
  13. 108
  14. 232
  15. 64
  16. 164
  17. 272
  18. 168
  19. 140
  20. 96
  21. 112
  22. 144
  23. 200
  24. 120
  25. 84
  26. 152
  27. 192
  28. 144
  29. 132
  30. 264
  31. 300
  32. 56
  33. 240
  34. 148
  35. 264
  36. 280
  37. 216
  38. 160
  39. 96
  40. 80

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