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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 414 · 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. 2.15 × 8 =
  3. 3.62 × 4 =
  4. 4.61 × 4 =
  5. 5.15 × 4 =
  6. 6.23 × 8 =
  7. 7.34 × 8 =
  8. 8.35 × 4 =
  9. 9.17 × 8 =
  10. 10.21 × 8 =
  11. 11.12 × 8 =
  12. 12.60 × 4 =
  13. 13.34 × 4 =
  14. 14.36 × 8 =
  15. 15.43 × 4 =
  16. 16.16 × 4 =
  17. 17.25 × 8 =
  18. 18.47 × 4 =
  19. 19.18 × 8 =
  20. 20.26 × 4 =
  21. 21.35 × 8 =
  22. 22.38 × 4 =
  23. 23.24 × 8 =
  24. 24.63 × 4 =
  25. 25.32 × 4 =
  26. 26.13 × 4 =
  27. 27.73 × 4 =
  28. 28.66 × 4 =
  29. 29.46 × 4 =
  30. 30.45 × 4 =
  31. 31.33 × 8 =
  32. 32.16 × 8 =
  33. 33.39 × 4 =
  34. 34.31 × 8 =
  35. 35.40 × 4 =
  36. 36.39 × 8 =
  37. 37.32 × 8 =
  38. 38.19 × 4 =
  39. 39.33 × 4 =
  40. 40.29 × 4 =

Answer key

  1. 144
  2. 120
  3. 248
  4. 244
  5. 60
  6. 184
  7. 272
  8. 140
  9. 136
  10. 168
  11. 96
  12. 240
  13. 136
  14. 288
  15. 172
  16. 64
  17. 200
  18. 188
  19. 144
  20. 104
  21. 280
  22. 152
  23. 192
  24. 252
  25. 128
  26. 52
  27. 292
  28. 264
  29. 184
  30. 180
  31. 264
  32. 128
  33. 156
  34. 248
  35. 160
  36. 312
  37. 256
  38. 76
  39. 132
  40. 116

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