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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 596 · 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. 1.12 × 8 =
  2. 2.73 × 4 =
  3. 3.15 × 8 =
  4. 4.15 × 4 =
  5. 5.35 × 8 =
  6. 6.40 × 4 =
  7. 7.16 × 4 =
  8. 8.26 × 4 =
  9. 9.41 × 4 =
  10. 10.25 × 8 =
  11. 11.13 × 8 =
  12. 12.22 × 4 =
  13. 13.33 × 8 =
  14. 14.26 × 8 =
  15. 15.28 × 8 =
  16. 16.39 × 4 =
  17. 17.30 × 4 =
  18. 18.34 × 4 =
  19. 19.14 × 8 =
  20. 20.71 × 4 =
  21. 21.20 × 4 =
  22. 22.45 × 4 =
  23. 23.19 × 8 =
  24. 24.23 × 4 =
  25. 25.31 × 8 =
  26. 26.36 × 4 =
  27. 27.75 × 4 =
  28. 28.32 × 4 =
  29. 29.72 × 4 =
  30. 30.23 × 8 =
  31. 31.35 × 4 =
  32. 32.29 × 8 =
  33. 33.28 × 4 =
  34. 34.18 × 8 =
  35. 35.13 × 4 =
  36. 36.36 × 8 =
  37. 37.22 × 8 =
  38. 38.51 × 4 =
  39. 39.19 × 4 =
  40. 40.65 × 4 =

Answer key

  1. 96
  2. 292
  3. 120
  4. 60
  5. 280
  6. 160
  7. 64
  8. 104
  9. 164
  10. 200
  11. 104
  12. 88
  13. 264
  14. 208
  15. 224
  16. 156
  17. 120
  18. 136
  19. 112
  20. 284
  21. 80
  22. 180
  23. 152
  24. 92
  25. 248
  26. 144
  27. 300
  28. 128
  29. 288
  30. 184
  31. 140
  32. 232
  33. 112
  34. 144
  35. 52
  36. 288
  37. 176
  38. 204
  39. 76
  40. 260

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