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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 964 · 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. 1.38 × 4 =
  2. 2.15 × 4 =
  3. 3.64 × 4 =
  4. 4.51 × 4 =
  5. 5.19 × 8 =
  6. 6.13 × 4 =
  7. 7.25 × 4 =
  8. 8.56 × 4 =
  9. 9.67 × 4 =
  10. 10.24 × 8 =
  11. 11.19 × 4 =
  12. 12.41 × 4 =
  13. 13.58 × 4 =
  14. 14.30 × 8 =
  15. 15.34 × 4 =
  16. 16.35 × 4 =
  17. 17.68 × 4 =
  18. 18.17 × 8 =
  19. 19.32 × 8 =
  20. 20.33 × 4 =
  21. 21.34 × 8 =
  22. 22.71 × 4 =
  23. 23.23 × 4 =
  24. 24.39 × 4 =
  25. 25.21 × 8 =
  26. 26.18 × 8 =
  27. 27.53 × 4 =
  28. 28.32 × 4 =
  29. 29.16 × 4 =
  30. 30.28 × 8 =
  31. 31.13 × 8 =
  32. 32.14 × 4 =
  33. 33.72 × 4 =
  34. 34.29 × 8 =
  35. 35.22 × 8 =
  36. 36.30 × 4 =
  37. 37.27 × 4 =
  38. 38.20 × 4 =
  39. 39.42 × 4 =
  40. 40.57 × 4 =

Answer key

  1. 152
  2. 60
  3. 256
  4. 204
  5. 152
  6. 52
  7. 100
  8. 224
  9. 268
  10. 192
  11. 76
  12. 164
  13. 232
  14. 240
  15. 136
  16. 140
  17. 272
  18. 136
  19. 256
  20. 132
  21. 272
  22. 284
  23. 92
  24. 156
  25. 168
  26. 144
  27. 212
  28. 128
  29. 64
  30. 224
  31. 104
  32. 56
  33. 288
  34. 232
  35. 176
  36. 120
  37. 108
  38. 80
  39. 168
  40. 228

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