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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 799 · 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. 1.24 × 4 =
  2. 2.56 × 4 =
  3. 3.65 × 4 =
  4. 4.29 × 8 =
  5. 5.25 × 8 =
  6. 6.67 × 4 =
  7. 7.39 × 4 =
  8. 8.53 × 4 =
  9. 9.18 × 4 =
  10. 10.20 × 4 =
  11. 11.23 × 4 =
  12. 12.21 × 8 =
  13. 13.28 × 8 =
  14. 14.37 × 8 =
  15. 15.14 × 8 =
  16. 16.17 × 8 =
  17. 17.19 × 4 =
  18. 18.22 × 4 =
  19. 19.40 × 4 =
  20. 20.35 × 8 =
  21. 21.32 × 8 =
  22. 22.39 × 8 =
  23. 23.40 × 8 =
  24. 24.26 × 8 =
  25. 25.29 × 4 =
  26. 26.19 × 8 =
  27. 27.18 × 8 =
  28. 28.71 × 4 =
  29. 29.12 × 8 =
  30. 30.27 × 4 =
  31. 31.46 × 4 =
  32. 32.42 × 4 =
  33. 33.24 × 8 =
  34. 34.26 × 4 =
  35. 35.50 × 4 =
  36. 36.16 × 8 =
  37. 37.27 × 8 =
  38. 38.12 × 4 =
  39. 39.28 × 4 =
  40. 40.21 × 4 =

Answer key

  1. 96
  2. 224
  3. 260
  4. 232
  5. 200
  6. 268
  7. 156
  8. 212
  9. 72
  10. 80
  11. 92
  12. 168
  13. 224
  14. 296
  15. 112
  16. 136
  17. 76
  18. 88
  19. 160
  20. 280
  21. 256
  22. 312
  23. 320
  24. 208
  25. 116
  26. 152
  27. 144
  28. 284
  29. 96
  30. 108
  31. 184
  32. 168
  33. 192
  34. 104
  35. 200
  36. 128
  37. 216
  38. 48
  39. 112
  40. 84

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