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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 437 · 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. 2.29 × 8 =
  3. 3.15 × 8 =
  4. 4.62 × 4 =
  5. 5.20 × 4 =
  6. 6.39 × 8 =
  7. 7.31 × 8 =
  8. 8.65 × 4 =
  9. 9.15 × 4 =
  10. 10.16 × 4 =
  11. 11.23 × 8 =
  12. 12.27 × 8 =
  13. 13.22 × 8 =
  14. 14.24 × 4 =
  15. 15.19 × 8 =
  16. 16.52 × 4 =
  17. 17.26 × 8 =
  18. 18.27 × 4 =
  19. 19.70 × 4 =
  20. 20.75 × 4 =
  21. 21.13 × 8 =
  22. 22.20 × 8 =
  23. 23.40 × 4 =
  24. 24.16 × 8 =
  25. 25.45 × 4 =
  26. 26.38 × 4 =
  27. 27.71 × 4 =
  28. 28.18 × 4 =
  29. 29.46 × 4 =
  30. 30.19 × 4 =
  31. 31.35 × 4 =
  32. 32.22 × 4 =
  33. 33.36 × 4 =
  34. 34.54 × 4 =
  35. 35.74 × 4 =
  36. 36.18 × 8 =
  37. 37.21 × 8 =
  38. 38.66 × 4 =
  39. 39.40 × 8 =
  40. 40.23 × 4 =

Answer key

  1. 228
  2. 232
  3. 120
  4. 248
  5. 80
  6. 312
  7. 248
  8. 260
  9. 60
  10. 64
  11. 184
  12. 216
  13. 176
  14. 96
  15. 152
  16. 208
  17. 208
  18. 108
  19. 280
  20. 300
  21. 104
  22. 160
  23. 160
  24. 128
  25. 180
  26. 152
  27. 284
  28. 72
  29. 184
  30. 76
  31. 140
  32. 88
  33. 144
  34. 216
  35. 296
  36. 144
  37. 168
  38. 264
  39. 320
  40. 92

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