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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 450 · 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. 1.17 × 8 =
  2. 2.26 × 8 =
  3. 3.75 × 4 =
  4. 4.42 × 4 =
  5. 5.24 × 4 =
  6. 6.72 × 4 =
  7. 7.15 × 8 =
  8. 8.32 × 8 =
  9. 9.22 × 8 =
  10. 10.18 × 8 =
  11. 11.36 × 8 =
  12. 12.67 × 4 =
  13. 13.48 × 4 =
  14. 14.73 × 4 =
  15. 15.38 × 8 =
  16. 16.50 × 4 =
  17. 17.64 × 4 =
  18. 18.19 × 8 =
  19. 19.35 × 8 =
  20. 20.62 × 4 =
  21. 21.71 × 4 =
  22. 22.44 × 4 =
  23. 23.13 × 4 =
  24. 24.19 × 4 =
  25. 25.32 × 4 =
  26. 26.35 × 4 =
  27. 27.40 × 4 =
  28. 28.16 × 8 =
  29. 29.24 × 8 =
  30. 30.20 × 8 =
  31. 31.27 × 8 =
  32. 32.30 × 8 =
  33. 33.66 × 4 =
  34. 34.28 × 4 =
  35. 35.41 × 4 =
  36. 36.55 × 4 =
  37. 37.70 × 4 =
  38. 38.14 × 4 =
  39. 39.25 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 136
  2. 208
  3. 300
  4. 168
  5. 96
  6. 288
  7. 120
  8. 256
  9. 176
  10. 144
  11. 288
  12. 268
  13. 192
  14. 292
  15. 304
  16. 200
  17. 256
  18. 152
  19. 280
  20. 248
  21. 284
  22. 176
  23. 52
  24. 76
  25. 128
  26. 140
  27. 160
  28. 128
  29. 192
  30. 160
  31. 216
  32. 240
  33. 264
  34. 112
  35. 164
  36. 220
  37. 280
  38. 56
  39. 100
  40. 232

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