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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 265 · 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. 1.33 × 8 =
  2. 2.22 × 4 =
  3. 3.37 × 8 =
  4. 4.16 × 4 =
  5. 5.19 × 8 =
  6. 6.20 × 4 =
  7. 7.55 × 4 =
  8. 8.21 × 4 =
  9. 9.30 × 4 =
  10. 10.16 × 8 =
  11. 11.53 × 4 =
  12. 12.27 × 8 =
  13. 13.19 × 4 =
  14. 14.15 × 4 =
  15. 15.45 × 4 =
  16. 16.14 × 8 =
  17. 17.40 × 8 =
  18. 18.52 × 4 =
  19. 19.43 × 4 =
  20. 20.32 × 4 =
  21. 21.25 × 4 =
  22. 22.50 × 4 =
  23. 23.29 × 4 =
  24. 24.30 × 8 =
  25. 25.60 × 4 =
  26. 26.36 × 8 =
  27. 27.13 × 8 =
  28. 28.70 × 4 =
  29. 29.18 × 8 =
  30. 30.75 × 4 =
  31. 31.46 × 4 =
  32. 32.12 × 4 =
  33. 33.67 × 4 =
  34. 34.40 × 4 =
  35. 35.20 × 8 =
  36. 36.33 × 4 =
  37. 37.12 × 8 =
  38. 38.24 × 8 =
  39. 39.38 × 8 =
  40. 40.62 × 4 =

Answer key

  1. 264
  2. 88
  3. 296
  4. 64
  5. 152
  6. 80
  7. 220
  8. 84
  9. 120
  10. 128
  11. 212
  12. 216
  13. 76
  14. 60
  15. 180
  16. 112
  17. 320
  18. 208
  19. 172
  20. 128
  21. 100
  22. 200
  23. 116
  24. 240
  25. 240
  26. 288
  27. 104
  28. 280
  29. 144
  30. 300
  31. 184
  32. 48
  33. 268
  34. 160
  35. 160
  36. 132
  37. 96
  38. 192
  39. 304
  40. 248

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