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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 521 · 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. 1.50 × 4 =
  2. 2.32 × 4 =
  3. 3.23 × 8 =
  4. 4.24 × 4 =
  5. 5.19 × 8 =
  6. 6.20 × 8 =
  7. 7.32 × 8 =
  8. 8.12 × 4 =
  9. 9.14 × 8 =
  10. 10.20 × 4 =
  11. 11.24 × 8 =
  12. 12.22 × 8 =
  13. 13.62 × 4 =
  14. 14.12 × 8 =
  15. 15.26 × 4 =
  16. 16.26 × 8 =
  17. 17.31 × 8 =
  18. 18.40 × 4 =
  19. 19.35 × 4 =
  20. 20.13 × 8 =
  21. 21.44 × 4 =
  22. 22.29 × 4 =
  23. 23.40 × 8 =
  24. 24.25 × 8 =
  25. 25.23 × 4 =
  26. 26.14 × 4 =
  27. 27.31 × 4 =
  28. 28.29 × 8 =
  29. 29.30 × 8 =
  30. 30.39 × 8 =
  31. 31.38 × 8 =
  32. 32.39 × 4 =
  33. 33.27 × 8 =
  34. 34.15 × 8 =
  35. 35.17 × 8 =
  36. 36.73 × 4 =
  37. 37.16 × 4 =
  38. 38.52 × 4 =
  39. 39.25 × 4 =
  40. 40.21 × 4 =

Answer key

  1. 200
  2. 128
  3. 184
  4. 96
  5. 152
  6. 160
  7. 256
  8. 48
  9. 112
  10. 80
  11. 192
  12. 176
  13. 248
  14. 96
  15. 104
  16. 208
  17. 248
  18. 160
  19. 140
  20. 104
  21. 176
  22. 116
  23. 320
  24. 200
  25. 92
  26. 56
  27. 124
  28. 232
  29. 240
  30. 312
  31. 304
  32. 156
  33. 216
  34. 120
  35. 136
  36. 292
  37. 64
  38. 208
  39. 100
  40. 84

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