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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 69 · 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. 1.56 × 4 =
  2. 2.33 × 8 =
  3. 3.51 × 4 =
  4. 4.73 × 4 =
  5. 5.22 × 4 =
  6. 6.25 × 8 =
  7. 7.39 × 8 =
  8. 8.31 × 4 =
  9. 9.67 × 4 =
  10. 10.32 × 8 =
  11. 11.29 × 4 =
  12. 12.37 × 8 =
  13. 13.20 × 8 =
  14. 14.47 × 4 =
  15. 15.18 × 4 =
  16. 16.23 × 4 =
  17. 17.19 × 4 =
  18. 18.24 × 8 =
  19. 19.46 × 4 =
  20. 20.27 × 4 =
  21. 21.18 × 8 =
  22. 22.21 × 4 =
  23. 23.54 × 4 =
  24. 24.15 × 4 =
  25. 25.13 × 8 =
  26. 26.27 × 8 =
  27. 27.16 × 8 =
  28. 28.75 × 4 =
  29. 29.71 × 4 =
  30. 30.48 × 4 =
  31. 31.21 × 8 =
  32. 32.33 × 4 =
  33. 33.72 × 4 =
  34. 34.50 × 4 =
  35. 35.30 × 4 =
  36. 36.38 × 4 =
  37. 37.26 × 4 =
  38. 38.74 × 4 =
  39. 39.23 × 8 =
  40. 40.29 × 8 =

Answer key

  1. 224
  2. 264
  3. 204
  4. 292
  5. 88
  6. 200
  7. 312
  8. 124
  9. 268
  10. 256
  11. 116
  12. 296
  13. 160
  14. 188
  15. 72
  16. 92
  17. 76
  18. 192
  19. 184
  20. 108
  21. 144
  22. 84
  23. 216
  24. 60
  25. 104
  26. 216
  27. 128
  28. 300
  29. 284
  30. 192
  31. 168
  32. 132
  33. 288
  34. 200
  35. 120
  36. 152
  37. 104
  38. 296
  39. 184
  40. 232

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