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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 934 · 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. 1.53 × 4 =
  2. 2.32 × 8 =
  3. 3.51 × 4 =
  4. 4.30 × 4 =
  5. 5.34 × 8 =
  6. 6.16 × 4 =
  7. 7.70 × 4 =
  8. 8.33 × 8 =
  9. 9.28 × 8 =
  10. 10.40 × 4 =
  11. 11.15 × 8 =
  12. 12.33 × 4 =
  13. 13.27 × 4 =
  14. 14.60 × 4 =
  15. 15.28 × 4 =
  16. 16.37 × 8 =
  17. 17.25 × 4 =
  18. 18.62 × 4 =
  19. 19.52 × 4 =
  20. 20.31 × 4 =
  21. 21.38 × 8 =
  22. 22.54 × 4 =
  23. 23.72 × 4 =
  24. 24.22 × 4 =
  25. 25.20 × 4 =
  26. 26.20 × 8 =
  27. 27.26 × 4 =
  28. 28.43 × 4 =
  29. 29.18 × 8 =
  30. 30.21 × 4 =
  31. 31.19 × 8 =
  32. 32.73 × 4 =
  33. 33.44 × 4 =
  34. 34.36 × 4 =
  35. 35.18 × 4 =
  36. 36.14 × 8 =
  37. 37.36 × 8 =
  38. 38.34 × 4 =
  39. 39.41 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 212
  2. 256
  3. 204
  4. 120
  5. 272
  6. 64
  7. 280
  8. 264
  9. 224
  10. 160
  11. 120
  12. 132
  13. 108
  14. 240
  15. 112
  16. 296
  17. 100
  18. 248
  19. 208
  20. 124
  21. 304
  22. 216
  23. 288
  24. 88
  25. 80
  26. 160
  27. 104
  28. 172
  29. 144
  30. 84
  31. 152
  32. 292
  33. 176
  34. 144
  35. 72
  36. 112
  37. 288
  38. 136
  39. 164
  40. 96

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