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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 785 · 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. 1.26 × 4 =
  2. 2.22 × 8 =
  3. 3.39 × 4 =
  4. 4.32 × 4 =
  5. 5.31 × 8 =
  6. 6.12 × 4 =
  7. 7.51 × 4 =
  8. 8.18 × 8 =
  9. 9.14 × 4 =
  10. 10.68 × 4 =
  11. 11.35 × 8 =
  12. 12.63 × 4 =
  13. 13.20 × 8 =
  14. 14.14 × 8 =
  15. 15.21 × 8 =
  16. 16.74 × 4 =
  17. 17.75 × 4 =
  18. 18.28 × 4 =
  19. 19.15 × 4 =
  20. 20.19 × 8 =
  21. 21.19 × 4 =
  22. 22.36 × 4 =
  23. 23.67 × 4 =
  24. 24.22 × 4 =
  25. 25.12 × 8 =
  26. 26.62 × 4 =
  27. 27.45 × 4 =
  28. 28.48 × 4 =
  29. 29.13 × 8 =
  30. 30.28 × 8 =
  31. 31.23 × 4 =
  32. 32.16 × 8 =
  33. 33.35 × 4 =
  34. 34.38 × 8 =
  35. 35.64 × 4 =
  36. 36.25 × 4 =
  37. 37.15 × 8 =
  38. 38.30 × 8 =
  39. 39.37 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 104
  2. 176
  3. 156
  4. 128
  5. 248
  6. 48
  7. 204
  8. 144
  9. 56
  10. 272
  11. 280
  12. 252
  13. 160
  14. 112
  15. 168
  16. 296
  17. 300
  18. 112
  19. 60
  20. 152
  21. 76
  22. 144
  23. 268
  24. 88
  25. 96
  26. 248
  27. 180
  28. 192
  29. 104
  30. 224
  31. 92
  32. 128
  33. 140
  34. 304
  35. 256
  36. 100
  37. 120
  38. 240
  39. 148
  40. 256

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