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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 878 · 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. 1.67 × 4 =
  2. 2.23 × 4 =
  3. 3.13 × 8 =
  4. 4.71 × 4 =
  5. 5.34 × 4 =
  6. 6.63 × 4 =
  7. 7.16 × 8 =
  8. 8.72 × 4 =
  9. 9.14 × 8 =
  10. 10.24 × 8 =
  11. 11.27 × 8 =
  12. 12.51 × 4 =
  13. 13.38 × 8 =
  14. 14.73 × 4 =
  15. 15.45 × 4 =
  16. 16.15 × 4 =
  17. 17.39 × 8 =
  18. 18.29 × 8 =
  19. 19.36 × 4 =
  20. 20.32 × 4 =
  21. 21.27 × 4 =
  22. 22.36 × 8 =
  23. 23.40 × 8 =
  24. 24.30 × 8 =
  25. 25.52 × 4 =
  26. 26.17 × 4 =
  27. 27.18 × 8 =
  28. 28.32 × 8 =
  29. 29.21 × 4 =
  30. 30.25 × 8 =
  31. 31.14 × 4 =
  32. 32.35 × 8 =
  33. 33.18 × 4 =
  34. 34.26 × 8 =
  35. 35.64 × 4 =
  36. 36.58 × 4 =
  37. 37.31 × 8 =
  38. 38.28 × 8 =
  39. 39.13 × 4 =
  40. 40.30 × 4 =

Answer key

  1. 268
  2. 92
  3. 104
  4. 284
  5. 136
  6. 252
  7. 128
  8. 288
  9. 112
  10. 192
  11. 216
  12. 204
  13. 304
  14. 292
  15. 180
  16. 60
  17. 312
  18. 232
  19. 144
  20. 128
  21. 108
  22. 288
  23. 320
  24. 240
  25. 208
  26. 68
  27. 144
  28. 256
  29. 84
  30. 200
  31. 56
  32. 280
  33. 72
  34. 208
  35. 256
  36. 232
  37. 248
  38. 224
  39. 52
  40. 120

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