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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 730 · 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. 1.33 × 8 =
  2. 2.26 × 8 =
  3. 3.35 × 4 =
  4. 4.52 × 4 =
  5. 5.13 × 4 =
  6. 6.16 × 8 =
  7. 7.22 × 8 =
  8. 8.19 × 8 =
  9. 9.40 × 4 =
  10. 10.18 × 4 =
  11. 11.36 × 8 =
  12. 12.34 × 8 =
  13. 13.30 × 8 =
  14. 14.39 × 8 =
  15. 15.14 × 4 =
  16. 16.40 × 8 =
  17. 17.17 × 8 =
  18. 18.20 × 8 =
  19. 19.15 × 4 =
  20. 20.32 × 8 =
  21. 21.31 × 8 =
  22. 22.75 × 4 =
  23. 23.31 × 4 =
  24. 24.21 × 8 =
  25. 25.56 × 4 =
  26. 26.28 × 8 =
  27. 27.12 × 8 =
  28. 28.37 × 8 =
  29. 29.13 × 8 =
  30. 30.15 × 8 =
  31. 31.69 × 4 =
  32. 32.46 × 4 =
  33. 33.38 × 8 =
  34. 34.41 × 4 =
  35. 35.66 × 4 =
  36. 36.47 × 4 =
  37. 37.22 × 4 =
  38. 38.23 × 4 =
  39. 39.73 × 4 =
  40. 40.23 × 8 =

Answer key

  1. 264
  2. 208
  3. 140
  4. 208
  5. 52
  6. 128
  7. 176
  8. 152
  9. 160
  10. 72
  11. 288
  12. 272
  13. 240
  14. 312
  15. 56
  16. 320
  17. 136
  18. 160
  19. 60
  20. 256
  21. 248
  22. 300
  23. 124
  24. 168
  25. 224
  26. 224
  27. 96
  28. 296
  29. 104
  30. 120
  31. 276
  32. 184
  33. 304
  34. 164
  35. 264
  36. 188
  37. 88
  38. 92
  39. 292
  40. 184

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