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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 734 · 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. 1.17 × 8 =
  2. 2.66 × 4 =
  3. 3.35 × 8 =
  4. 4.26 × 4 =
  5. 5.35 × 4 =
  6. 6.73 × 4 =
  7. 7.12 × 8 =
  8. 8.15 × 8 =
  9. 9.34 × 8 =
  10. 10.40 × 8 =
  11. 11.72 × 4 =
  12. 12.49 × 4 =
  13. 13.36 × 8 =
  14. 14.28 × 8 =
  15. 15.62 × 4 =
  16. 16.53 × 4 =
  17. 17.58 × 4 =
  18. 18.37 × 8 =
  19. 19.60 × 4 =
  20. 20.29 × 4 =
  21. 21.34 × 4 =
  22. 22.16 × 8 =
  23. 23.69 × 4 =
  24. 24.25 × 8 =
  25. 25.42 × 4 =
  26. 26.33 × 8 =
  27. 27.15 × 4 =
  28. 28.29 × 8 =
  29. 29.75 × 4 =
  30. 30.21 × 4 =
  31. 31.22 × 4 =
  32. 32.46 × 4 =
  33. 33.20 × 4 =
  34. 34.38 × 8 =
  35. 35.14 × 4 =
  36. 36.23 × 8 =
  37. 37.25 × 4 =
  38. 38.52 × 4 =
  39. 39.19 × 8 =
  40. 40.57 × 4 =

Answer key

  1. 136
  2. 264
  3. 280
  4. 104
  5. 140
  6. 292
  7. 96
  8. 120
  9. 272
  10. 320
  11. 288
  12. 196
  13. 288
  14. 224
  15. 248
  16. 212
  17. 232
  18. 296
  19. 240
  20. 116
  21. 136
  22. 128
  23. 276
  24. 200
  25. 168
  26. 264
  27. 60
  28. 232
  29. 300
  30. 84
  31. 88
  32. 184
  33. 80
  34. 304
  35. 56
  36. 184
  37. 100
  38. 208
  39. 152
  40. 228

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