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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 667 · 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. 1.57 × 4 =
  2. 2.63 × 4 =
  3. 3.58 × 4 =
  4. 4.31 × 8 =
  5. 5.23 × 8 =
  6. 6.52 × 4 =
  7. 7.73 × 4 =
  8. 8.50 × 4 =
  9. 9.67 × 4 =
  10. 10.36 × 4 =
  11. 11.22 × 4 =
  12. 12.71 × 4 =
  13. 13.24 × 4 =
  14. 14.20 × 4 =
  15. 15.72 × 4 =
  16. 16.12 × 8 =
  17. 17.29 × 8 =
  18. 18.30 × 8 =
  19. 19.18 × 4 =
  20. 20.40 × 4 =
  21. 21.17 × 4 =
  22. 22.33 × 8 =
  23. 23.35 × 4 =
  24. 24.75 × 4 =
  25. 25.26 × 8 =
  26. 26.19 × 4 =
  27. 27.39 × 8 =
  28. 28.56 × 4 =
  29. 29.20 × 8 =
  30. 30.36 × 8 =
  31. 31.51 × 4 =
  32. 32.43 × 4 =
  33. 33.25 × 4 =
  34. 34.32 × 4 =
  35. 35.14 × 8 =
  36. 36.13 × 8 =
  37. 37.16 × 8 =
  38. 38.27 × 4 =
  39. 39.21 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 228
  2. 252
  3. 232
  4. 248
  5. 184
  6. 208
  7. 292
  8. 200
  9. 268
  10. 144
  11. 88
  12. 284
  13. 96
  14. 80
  15. 288
  16. 96
  17. 232
  18. 240
  19. 72
  20. 160
  21. 68
  22. 264
  23. 140
  24. 300
  25. 208
  26. 76
  27. 312
  28. 224
  29. 160
  30. 288
  31. 204
  32. 172
  33. 100
  34. 128
  35. 112
  36. 104
  37. 128
  38. 108
  39. 84
  40. 280

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