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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 931 · 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. 1.34 × 4 =
  2. 2.38 × 8 =
  3. 3.13 × 8 =
  4. 4.29 × 8 =
  5. 5.36 × 8 =
  6. 6.55 × 4 =
  7. 7.15 × 4 =
  8. 8.39 × 8 =
  9. 9.54 × 4 =
  10. 10.59 × 4 =
  11. 11.41 × 4 =
  12. 12.24 × 4 =
  13. 13.56 × 4 =
  14. 14.35 × 8 =
  15. 15.32 × 4 =
  16. 16.18 × 8 =
  17. 17.70 × 4 =
  18. 18.40 × 8 =
  19. 19.27 × 8 =
  20. 20.72 × 4 =
  21. 21.38 × 4 =
  22. 22.23 × 8 =
  23. 23.32 × 8 =
  24. 24.37 × 8 =
  25. 25.14 × 8 =
  26. 26.22 × 8 =
  27. 27.25 × 8 =
  28. 28.29 × 4 =
  29. 29.51 × 4 =
  30. 30.64 × 4 =
  31. 31.23 × 4 =
  32. 32.12 × 8 =
  33. 33.75 × 4 =
  34. 34.20 × 4 =
  35. 35.22 × 4 =
  36. 36.47 × 4 =
  37. 37.39 × 4 =
  38. 38.31 × 8 =
  39. 39.12 × 4 =
  40. 40.21 × 8 =

Answer key

  1. 136
  2. 304
  3. 104
  4. 232
  5. 288
  6. 220
  7. 60
  8. 312
  9. 216
  10. 236
  11. 164
  12. 96
  13. 224
  14. 280
  15. 128
  16. 144
  17. 280
  18. 320
  19. 216
  20. 288
  21. 152
  22. 184
  23. 256
  24. 296
  25. 112
  26. 176
  27. 200
  28. 116
  29. 204
  30. 256
  31. 92
  32. 96
  33. 300
  34. 80
  35. 88
  36. 188
  37. 156
  38. 248
  39. 48
  40. 168

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