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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 564 · 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 × 4 =
  2. 2.38 × 4 =
  3. 3.46 × 4 =
  4. 4.41 × 4 =
  5. 5.22 × 4 =
  6. 6.25 × 8 =
  7. 7.60 × 4 =
  8. 8.72 × 4 =
  9. 9.70 × 4 =
  10. 10.27 × 8 =
  11. 11.43 × 4 =
  12. 12.74 × 4 =
  13. 13.17 × 8 =
  14. 14.15 × 4 =
  15. 15.45 × 4 =
  16. 16.40 × 8 =
  17. 17.23 × 4 =
  18. 18.28 × 8 =
  19. 19.62 × 4 =
  20. 20.33 × 4 =
  21. 21.20 × 4 =
  22. 22.31 × 8 =
  23. 23.35 × 8 =
  24. 24.37 × 8 =
  25. 25.20 × 8 =
  26. 26.14 × 8 =
  27. 27.16 × 4 =
  28. 28.73 × 4 =
  29. 29.37 × 4 =
  30. 30.13 × 4 =
  31. 31.28 × 4 =
  32. 32.19 × 8 =
  33. 33.30 × 4 =
  34. 34.42 × 4 =
  35. 35.12 × 8 =
  36. 36.57 × 4 =
  37. 37.63 × 4 =
  38. 38.32 × 4 =
  39. 39.39 × 8 =
  40. 40.12 × 4 =

Answer key

  1. 68
  2. 152
  3. 184
  4. 164
  5. 88
  6. 200
  7. 240
  8. 288
  9. 280
  10. 216
  11. 172
  12. 296
  13. 136
  14. 60
  15. 180
  16. 320
  17. 92
  18. 224
  19. 248
  20. 132
  21. 80
  22. 248
  23. 280
  24. 296
  25. 160
  26. 112
  27. 64
  28. 292
  29. 148
  30. 52
  31. 112
  32. 152
  33. 120
  34. 168
  35. 96
  36. 228
  37. 252
  38. 128
  39. 312
  40. 48

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