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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 965 · 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. 1.36 × 4 =
  2. 2.12 × 8 =
  3. 3.37 × 8 =
  4. 4.22 × 8 =
  5. 5.39 × 8 =
  6. 6.34 × 8 =
  7. 7.27 × 8 =
  8. 8.24 × 8 =
  9. 9.12 × 4 =
  10. 10.38 × 4 =
  11. 11.15 × 8 =
  12. 12.38 × 8 =
  13. 13.20 × 8 =
  14. 14.18 × 4 =
  15. 15.15 × 4 =
  16. 16.41 × 4 =
  17. 17.22 × 4 =
  18. 18.40 × 8 =
  19. 19.73 × 4 =
  20. 20.34 × 4 =
  21. 21.29 × 4 =
  22. 22.32 × 8 =
  23. 23.48 × 4 =
  24. 24.43 × 4 =
  25. 25.46 × 4 =
  26. 26.56 × 4 =
  27. 27.26 × 4 =
  28. 28.51 × 4 =
  29. 29.42 × 4 =
  30. 30.70 × 4 =
  31. 31.25 × 8 =
  32. 32.28 × 8 =
  33. 33.71 × 4 =
  34. 34.14 × 4 =
  35. 35.68 × 4 =
  36. 36.35 × 4 =
  37. 37.23 × 4 =
  38. 38.75 × 4 =
  39. 39.19 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 144
  2. 96
  3. 296
  4. 176
  5. 312
  6. 272
  7. 216
  8. 192
  9. 48
  10. 152
  11. 120
  12. 304
  13. 160
  14. 72
  15. 60
  16. 164
  17. 88
  18. 320
  19. 292
  20. 136
  21. 116
  22. 256
  23. 192
  24. 172
  25. 184
  26. 224
  27. 104
  28. 204
  29. 168
  30. 280
  31. 200
  32. 224
  33. 284
  34. 56
  35. 272
  36. 140
  37. 92
  38. 300
  39. 76
  40. 280

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