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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 277 · 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. 1.57 × 4 =
  2. 2.14 × 4 =
  3. 3.16 × 4 =
  4. 4.20 × 8 =
  5. 5.21 × 4 =
  6. 6.32 × 8 =
  7. 7.16 × 8 =
  8. 8.38 × 8 =
  9. 9.26 × 8 =
  10. 10.39 × 8 =
  11. 11.28 × 8 =
  12. 12.19 × 4 =
  13. 13.46 × 4 =
  14. 14.37 × 4 =
  15. 15.35 × 4 =
  16. 16.27 × 4 =
  17. 17.15 × 8 =
  18. 18.17 × 4 =
  19. 19.70 × 4 =
  20. 20.13 × 4 =
  21. 21.33 × 4 =
  22. 22.60 × 4 =
  23. 23.27 × 8 =
  24. 24.40 × 8 =
  25. 25.37 × 8 =
  26. 26.66 × 4 =
  27. 27.26 × 4 =
  28. 28.24 × 4 =
  29. 29.33 × 8 =
  30. 30.48 × 4 =
  31. 31.19 × 8 =
  32. 32.38 × 4 =
  33. 33.23 × 8 =
  34. 34.62 × 4 =
  35. 35.25 × 8 =
  36. 36.39 × 4 =
  37. 37.69 × 4 =
  38. 38.34 × 8 =
  39. 39.68 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 228
  2. 56
  3. 64
  4. 160
  5. 84
  6. 256
  7. 128
  8. 304
  9. 208
  10. 312
  11. 224
  12. 76
  13. 184
  14. 148
  15. 140
  16. 108
  17. 120
  18. 68
  19. 280
  20. 52
  21. 132
  22. 240
  23. 216
  24. 320
  25. 296
  26. 264
  27. 104
  28. 96
  29. 264
  30. 192
  31. 152
  32. 152
  33. 184
  34. 248
  35. 200
  36. 156
  37. 276
  38. 272
  39. 272
  40. 268

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