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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 303 · 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. 1.20 × 4 =
  2. 2.64 × 4 =
  3. 3.24 × 8 =
  4. 4.51 × 4 =
  5. 5.21 × 8 =
  6. 6.33 × 4 =
  7. 7.33 × 8 =
  8. 8.32 × 8 =
  9. 9.40 × 4 =
  10. 10.25 × 4 =
  11. 11.23 × 4 =
  12. 12.47 × 4 =
  13. 13.18 × 4 =
  14. 14.27 × 4 =
  15. 15.53 × 4 =
  16. 16.45 × 4 =
  17. 17.28 × 4 =
  18. 18.73 × 4 =
  19. 19.37 × 4 =
  20. 20.59 × 4 =
  21. 21.30 × 8 =
  22. 22.39 × 8 =
  23. 23.32 × 4 =
  24. 24.35 × 8 =
  25. 25.15 × 4 =
  26. 26.20 × 8 =
  27. 27.12 × 8 =
  28. 28.17 × 8 =
  29. 29.44 × 4 =
  30. 30.29 × 8 =
  31. 31.69 × 4 =
  32. 32.75 × 4 =
  33. 33.49 × 4 =
  34. 34.34 × 8 =
  35. 35.13 × 4 =
  36. 36.19 × 4 =
  37. 37.17 × 4 =
  38. 38.24 × 4 =
  39. 39.70 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 80
  2. 256
  3. 192
  4. 204
  5. 168
  6. 132
  7. 264
  8. 256
  9. 160
  10. 100
  11. 92
  12. 188
  13. 72
  14. 108
  15. 212
  16. 180
  17. 112
  18. 292
  19. 148
  20. 236
  21. 240
  22. 312
  23. 128
  24. 280
  25. 60
  26. 160
  27. 96
  28. 136
  29. 176
  30. 232
  31. 276
  32. 300
  33. 196
  34. 272
  35. 52
  36. 76
  37. 68
  38. 96
  39. 280
  40. 176

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