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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 928 · 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. 1.21 × 4 =
  2. 2.29 × 8 =
  3. 3.17 × 8 =
  4. 4.15 × 8 =
  5. 5.36 × 8 =
  6. 6.14 × 8 =
  7. 7.63 × 4 =
  8. 8.75 × 4 =
  9. 9.41 × 4 =
  10. 10.33 × 8 =
  11. 11.13 × 4 =
  12. 12.37 × 4 =
  13. 13.50 × 4 =
  14. 14.32 × 4 =
  15. 15.20 × 4 =
  16. 16.23 × 8 =
  17. 17.69 × 4 =
  18. 18.26 × 8 =
  19. 19.57 × 4 =
  20. 20.51 × 4 =
  21. 21.54 × 4 =
  22. 22.16 × 4 =
  23. 23.40 × 8 =
  24. 24.38 × 8 =
  25. 25.71 × 4 =
  26. 26.15 × 4 =
  27. 27.12 × 8 =
  28. 28.28 × 8 =
  29. 29.27 × 4 =
  30. 30.30 × 4 =
  31. 31.19 × 8 =
  32. 32.23 × 4 =
  33. 33.33 × 4 =
  34. 34.36 × 4 =
  35. 35.18 × 8 =
  36. 36.45 × 4 =
  37. 37.58 × 4 =
  38. 38.22 × 4 =
  39. 39.73 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 84
  2. 232
  3. 136
  4. 120
  5. 288
  6. 112
  7. 252
  8. 300
  9. 164
  10. 264
  11. 52
  12. 148
  13. 200
  14. 128
  15. 80
  16. 184
  17. 276
  18. 208
  19. 228
  20. 204
  21. 216
  22. 64
  23. 320
  24. 304
  25. 284
  26. 60
  27. 96
  28. 224
  29. 108
  30. 120
  31. 152
  32. 92
  33. 132
  34. 144
  35. 144
  36. 180
  37. 232
  38. 88
  39. 292
  40. 240

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