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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 743 · 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. 1.14 × 8 =
  2. 2.21 × 8 =
  3. 3.70 × 4 =
  4. 4.36 × 8 =
  5. 5.34 × 8 =
  6. 6.40 × 4 =
  7. 7.22 × 4 =
  8. 8.20 × 8 =
  9. 9.31 × 8 =
  10. 10.49 × 4 =
  11. 11.31 × 4 =
  12. 12.39 × 8 =
  13. 13.28 × 8 =
  14. 14.12 × 8 =
  15. 15.74 × 4 =
  16. 16.33 × 8 =
  17. 17.44 × 4 =
  18. 18.66 × 4 =
  19. 19.18 × 4 =
  20. 20.30 × 4 =
  21. 21.24 × 4 =
  22. 22.51 × 4 =
  23. 23.61 × 4 =
  24. 24.34 × 4 =
  25. 25.15 × 4 =
  26. 26.75 × 4 =
  27. 27.62 × 4 =
  28. 28.27 × 4 =
  29. 29.26 × 8 =
  30. 30.27 × 8 =
  31. 31.41 × 4 =
  32. 32.38 × 8 =
  33. 33.16 × 8 =
  34. 34.54 × 4 =
  35. 35.13 × 4 =
  36. 36.16 × 4 =
  37. 37.67 × 4 =
  38. 38.22 × 8 =
  39. 39.20 × 4 =
  40. 40.59 × 4 =

Answer key

  1. 112
  2. 168
  3. 280
  4. 288
  5. 272
  6. 160
  7. 88
  8. 160
  9. 248
  10. 196
  11. 124
  12. 312
  13. 224
  14. 96
  15. 296
  16. 264
  17. 176
  18. 264
  19. 72
  20. 120
  21. 96
  22. 204
  23. 244
  24. 136
  25. 60
  26. 300
  27. 248
  28. 108
  29. 208
  30. 216
  31. 164
  32. 304
  33. 128
  34. 216
  35. 52
  36. 64
  37. 268
  38. 176
  39. 80
  40. 236

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