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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 269 · 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. 1.20 × 8 =
  2. 2.38 × 8 =
  3. 3.31 × 8 =
  4. 4.63 × 4 =
  5. 5.25 × 4 =
  6. 6.32 × 4 =
  7. 7.21 × 8 =
  8. 8.17 × 8 =
  9. 9.47 × 4 =
  10. 10.50 × 4 =
  11. 11.22 × 4 =
  12. 12.37 × 8 =
  13. 13.45 × 4 =
  14. 14.13 × 4 =
  15. 15.40 × 8 =
  16. 16.35 × 8 =
  17. 17.67 × 4 =
  18. 18.30 × 8 =
  19. 19.74 × 4 =
  20. 20.43 × 4 =
  21. 21.13 × 8 =
  22. 22.26 × 4 =
  23. 23.34 × 4 =
  24. 24.60 × 4 =
  25. 25.20 × 4 =
  26. 26.36 × 8 =
  27. 27.14 × 4 =
  28. 28.21 × 4 =
  29. 29.23 × 4 =
  30. 30.39 × 8 =
  31. 31.19 × 8 =
  32. 32.24 × 4 =
  33. 33.16 × 4 =
  34. 34.69 × 4 =
  35. 35.14 × 8 =
  36. 36.18 × 8 =
  37. 37.25 × 8 =
  38. 38.29 × 4 =
  39. 39.24 × 8 =
  40. 40.15 × 4 =

Answer key

  1. 160
  2. 304
  3. 248
  4. 252
  5. 100
  6. 128
  7. 168
  8. 136
  9. 188
  10. 200
  11. 88
  12. 296
  13. 180
  14. 52
  15. 320
  16. 280
  17. 268
  18. 240
  19. 296
  20. 172
  21. 104
  22. 104
  23. 136
  24. 240
  25. 80
  26. 288
  27. 56
  28. 84
  29. 92
  30. 312
  31. 152
  32. 96
  33. 64
  34. 276
  35. 112
  36. 144
  37. 200
  38. 116
  39. 192
  40. 60

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