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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 929 · 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. 1.24 × 8 =
  2. 2.12 × 4 =
  3. 3.25 × 8 =
  4. 4.13 × 8 =
  5. 5.21 × 4 =
  6. 6.14 × 8 =
  7. 7.27 × 8 =
  8. 8.40 × 8 =
  9. 9.42 × 4 =
  10. 10.72 × 4 =
  11. 11.57 × 4 =
  12. 12.22 × 4 =
  13. 13.26 × 8 =
  14. 14.23 × 8 =
  15. 15.29 × 8 =
  16. 16.37 × 4 =
  17. 17.28 × 8 =
  18. 18.54 × 4 =
  19. 19.18 × 8 =
  20. 20.64 × 4 =
  21. 21.58 × 4 =
  22. 22.75 × 4 =
  23. 23.48 × 4 =
  24. 24.41 × 4 =
  25. 25.12 × 8 =
  26. 26.16 × 4 =
  27. 27.39 × 4 =
  28. 28.69 × 4 =
  29. 29.30 × 8 =
  30. 30.32 × 8 =
  31. 31.23 × 4 =
  32. 32.15 × 4 =
  33. 33.25 × 4 =
  34. 34.34 × 8 =
  35. 35.73 × 4 =
  36. 36.70 × 4 =
  37. 37.63 × 4 =
  38. 38.37 × 8 =
  39. 39.49 × 4 =
  40. 40.31 × 8 =

Answer key

  1. 192
  2. 48
  3. 200
  4. 104
  5. 84
  6. 112
  7. 216
  8. 320
  9. 168
  10. 288
  11. 228
  12. 88
  13. 208
  14. 184
  15. 232
  16. 148
  17. 224
  18. 216
  19. 144
  20. 256
  21. 232
  22. 300
  23. 192
  24. 164
  25. 96
  26. 64
  27. 156
  28. 276
  29. 240
  30. 256
  31. 92
  32. 60
  33. 100
  34. 272
  35. 292
  36. 280
  37. 252
  38. 296
  39. 196
  40. 248

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