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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 584 · 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. 2.16 × 8 =
  3. 3.45 × 4 =
  4. 4.67 × 4 =
  5. 5.64 × 4 =
  6. 6.74 × 4 =
  7. 7.37 × 8 =
  8. 8.27 × 4 =
  9. 9.17 × 8 =
  10. 10.62 × 4 =
  11. 11.19 × 8 =
  12. 12.31 × 8 =
  13. 13.63 × 4 =
  14. 14.15 × 4 =
  15. 15.21 × 8 =
  16. 16.43 × 4 =
  17. 17.28 × 8 =
  18. 18.18 × 4 =
  19. 19.12 × 8 =
  20. 20.37 × 4 =
  21. 21.17 × 4 =
  22. 22.25 × 4 =
  23. 23.34 × 4 =
  24. 24.75 × 4 =
  25. 25.36 × 4 =
  26. 26.41 × 4 =
  27. 27.20 × 8 =
  28. 28.32 × 4 =
  29. 29.14 × 4 =
  30. 30.38 × 8 =
  31. 31.14 × 8 =
  32. 32.32 × 8 =
  33. 33.66 × 4 =
  34. 34.18 × 8 =
  35. 35.15 × 8 =
  36. 36.52 × 4 =
  37. 37.38 × 4 =
  38. 38.26 × 4 =
  39. 39.40 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 80
  2. 128
  3. 180
  4. 268
  5. 256
  6. 296
  7. 296
  8. 108
  9. 136
  10. 248
  11. 152
  12. 248
  13. 252
  14. 60
  15. 168
  16. 172
  17. 224
  18. 72
  19. 96
  20. 148
  21. 68
  22. 100
  23. 136
  24. 300
  25. 144
  26. 164
  27. 160
  28. 128
  29. 56
  30. 304
  31. 112
  32. 256
  33. 264
  34. 144
  35. 120
  36. 208
  37. 152
  38. 104
  39. 160
  40. 280

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