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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 27 · 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. 1.24 × 4 =
  2. 2.56 × 4 =
  3. 3.25 × 4 =
  4. 4.54 × 4 =
  5. 5.47 × 4 =
  6. 6.23 × 8 =
  7. 7.16 × 4 =
  8. 8.19 × 8 =
  9. 9.13 × 8 =
  10. 10.32 × 8 =
  11. 11.71 × 4 =
  12. 12.69 × 4 =
  13. 13.38 × 4 =
  14. 14.24 × 8 =
  15. 15.20 × 8 =
  16. 16.37 × 8 =
  17. 17.31 × 8 =
  18. 18.12 × 8 =
  19. 19.14 × 8 =
  20. 20.61 × 4 =
  21. 21.65 × 4 =
  22. 22.15 × 8 =
  23. 23.21 × 8 =
  24. 24.28 × 8 =
  25. 25.51 × 4 =
  26. 26.27 × 8 =
  27. 27.15 × 4 =
  28. 28.31 × 4 =
  29. 29.20 × 4 =
  30. 30.45 × 4 =
  31. 31.35 × 8 =
  32. 32.64 × 4 =
  33. 33.30 × 8 =
  34. 34.27 × 4 =
  35. 35.26 × 8 =
  36. 36.17 × 8 =
  37. 37.41 × 4 =
  38. 38.53 × 4 =
  39. 39.28 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 96
  2. 224
  3. 100
  4. 216
  5. 188
  6. 184
  7. 64
  8. 152
  9. 104
  10. 256
  11. 284
  12. 276
  13. 152
  14. 192
  15. 160
  16. 296
  17. 248
  18. 96
  19. 112
  20. 244
  21. 260
  22. 120
  23. 168
  24. 224
  25. 204
  26. 216
  27. 60
  28. 124
  29. 80
  30. 180
  31. 280
  32. 256
  33. 240
  34. 108
  35. 208
  36. 136
  37. 164
  38. 212
  39. 112
  40. 232

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