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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 54 · 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. 1.30 × 8 =
  2. 2.16 × 4 =
  3. 3.28 × 8 =
  4. 4.22 × 8 =
  5. 5.36 × 8 =
  6. 6.25 × 8 =
  7. 7.21 × 4 =
  8. 8.26 × 8 =
  9. 9.72 × 4 =
  10. 10.39 × 8 =
  11. 11.50 × 4 =
  12. 12.75 × 4 =
  13. 13.16 × 8 =
  14. 14.23 × 8 =
  15. 15.35 × 8 =
  16. 16.43 × 4 =
  17. 17.38 × 4 =
  18. 18.14 × 8 =
  19. 19.61 × 4 =
  20. 20.37 × 8 =
  21. 21.48 × 4 =
  22. 22.68 × 4 =
  23. 23.12 × 8 =
  24. 24.25 × 4 =
  25. 25.19 × 4 =
  26. 26.29 × 4 =
  27. 27.22 × 4 =
  28. 28.40 × 8 =
  29. 29.34 × 4 =
  30. 30.64 × 4 =
  31. 31.35 × 4 =
  32. 32.73 × 4 =
  33. 33.24 × 8 =
  34. 34.41 × 4 =
  35. 35.44 × 4 =
  36. 36.29 × 8 =
  37. 37.47 × 4 =
  38. 38.70 × 4 =
  39. 39.34 × 8 =
  40. 40.18 × 8 =

Answer key

  1. 240
  2. 64
  3. 224
  4. 176
  5. 288
  6. 200
  7. 84
  8. 208
  9. 288
  10. 312
  11. 200
  12. 300
  13. 128
  14. 184
  15. 280
  16. 172
  17. 152
  18. 112
  19. 244
  20. 296
  21. 192
  22. 272
  23. 96
  24. 100
  25. 76
  26. 116
  27. 88
  28. 320
  29. 136
  30. 256
  31. 140
  32. 292
  33. 192
  34. 164
  35. 176
  36. 232
  37. 188
  38. 280
  39. 272
  40. 144

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