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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 531 · 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. 1.36 × 4 =
  2. 2.34 × 8 =
  3. 3.32 × 4 =
  4. 4.66 × 4 =
  5. 5.39 × 4 =
  6. 6.33 × 8 =
  7. 7.18 × 8 =
  8. 8.29 × 4 =
  9. 9.24 × 4 =
  10. 10.34 × 4 =
  11. 11.16 × 4 =
  12. 12.17 × 8 =
  13. 13.38 × 8 =
  14. 14.25 × 8 =
  15. 15.16 × 8 =
  16. 16.58 × 4 =
  17. 17.17 × 4 =
  18. 18.54 × 4 =
  19. 19.37 × 4 =
  20. 20.26 × 8 =
  21. 21.27 × 8 =
  22. 22.13 × 8 =
  23. 23.23 × 4 =
  24. 24.20 × 8 =
  25. 25.61 × 4 =
  26. 26.49 × 4 =
  27. 27.60 × 4 =
  28. 28.22 × 8 =
  29. 29.68 × 4 =
  30. 30.12 × 4 =
  31. 31.40 × 8 =
  32. 32.20 × 4 =
  33. 33.32 × 8 =
  34. 34.28 × 4 =
  35. 35.70 × 4 =
  36. 36.14 × 8 =
  37. 37.18 × 4 =
  38. 38.29 × 8 =
  39. 39.31 × 8 =
  40. 40.31 × 4 =

Answer key

  1. 144
  2. 272
  3. 128
  4. 264
  5. 156
  6. 264
  7. 144
  8. 116
  9. 96
  10. 136
  11. 64
  12. 136
  13. 304
  14. 200
  15. 128
  16. 232
  17. 68
  18. 216
  19. 148
  20. 208
  21. 216
  22. 104
  23. 92
  24. 160
  25. 244
  26. 196
  27. 240
  28. 176
  29. 272
  30. 48
  31. 320
  32. 80
  33. 256
  34. 112
  35. 280
  36. 112
  37. 72
  38. 232
  39. 248
  40. 124

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