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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 831 · 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. 1.27 × 4 =
  2. 2.58 × 4 =
  3. 3.17 × 8 =
  4. 4.19 × 4 =
  5. 5.45 × 4 =
  6. 6.13 × 4 =
  7. 7.34 × 8 =
  8. 8.19 × 8 =
  9. 9.46 × 4 =
  10. 10.28 × 8 =
  11. 11.38 × 8 =
  12. 12.71 × 4 =
  13. 13.15 × 8 =
  14. 14.12 × 8 =
  15. 15.20 × 4 =
  16. 16.25 × 4 =
  17. 17.26 × 8 =
  18. 18.35 × 4 =
  19. 19.23 × 4 =
  20. 20.27 × 8 =
  21. 21.17 × 4 =
  22. 22.23 × 8 =
  23. 23.21 × 8 =
  24. 24.64 × 4 =
  25. 25.36 × 8 =
  26. 26.22 × 8 =
  27. 27.48 × 4 =
  28. 28.69 × 4 =
  29. 29.44 × 4 =
  30. 30.22 × 4 =
  31. 31.72 × 4 =
  32. 32.60 × 4 =
  33. 33.35 × 8 =
  34. 34.29 × 8 =
  35. 35.51 × 4 =
  36. 36.14 × 4 =
  37. 37.32 × 4 =
  38. 38.34 × 4 =
  39. 39.38 × 4 =
  40. 40.29 × 4 =

Answer key

  1. 108
  2. 232
  3. 136
  4. 76
  5. 180
  6. 52
  7. 272
  8. 152
  9. 184
  10. 224
  11. 304
  12. 284
  13. 120
  14. 96
  15. 80
  16. 100
  17. 208
  18. 140
  19. 92
  20. 216
  21. 68
  22. 184
  23. 168
  24. 256
  25. 288
  26. 176
  27. 192
  28. 276
  29. 176
  30. 88
  31. 288
  32. 240
  33. 280
  34. 232
  35. 204
  36. 56
  37. 128
  38. 136
  39. 152
  40. 116

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