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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 630 · 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. 1.23 × 8 =
  2. 2.31 × 8 =
  3. 3.39 × 4 =
  4. 4.56 × 4 =
  5. 5.27 × 4 =
  6. 6.25 × 8 =
  7. 7.26 × 4 =
  8. 8.16 × 8 =
  9. 9.36 × 4 =
  10. 10.18 × 8 =
  11. 11.38 × 8 =
  12. 12.17 × 8 =
  13. 13.18 × 4 =
  14. 14.49 × 4 =
  15. 15.43 × 4 =
  16. 16.24 × 8 =
  17. 17.15 × 8 =
  18. 18.24 × 4 =
  19. 19.34 × 4 =
  20. 20.44 × 4 =
  21. 21.23 × 4 =
  22. 22.29 × 8 =
  23. 23.60 × 4 =
  24. 24.32 × 8 =
  25. 25.20 × 4 =
  26. 26.15 × 4 =
  27. 27.29 × 4 =
  28. 28.31 × 4 =
  29. 29.64 × 4 =
  30. 30.27 × 8 =
  31. 31.72 × 4 =
  32. 32.66 × 4 =
  33. 33.32 × 4 =
  34. 34.35 × 8 =
  35. 35.22 × 8 =
  36. 36.28 × 8 =
  37. 37.40 × 8 =
  38. 38.39 × 8 =
  39. 39.20 × 8 =
  40. 40.17 × 4 =

Answer key

  1. 184
  2. 248
  3. 156
  4. 224
  5. 108
  6. 200
  7. 104
  8. 128
  9. 144
  10. 144
  11. 304
  12. 136
  13. 72
  14. 196
  15. 172
  16. 192
  17. 120
  18. 96
  19. 136
  20. 176
  21. 92
  22. 232
  23. 240
  24. 256
  25. 80
  26. 60
  27. 116
  28. 124
  29. 256
  30. 216
  31. 288
  32. 264
  33. 128
  34. 280
  35. 176
  36. 224
  37. 320
  38. 312
  39. 160
  40. 68

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