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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 607 · 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. 1.13 × 8 =
  2. 2.19 × 8 =
  3. 3.30 × 8 =
  4. 4.39 × 8 =
  5. 5.55 × 4 =
  6. 6.23 × 4 =
  7. 7.25 × 4 =
  8. 8.17 × 8 =
  9. 9.20 × 4 =
  10. 10.30 × 4 =
  11. 11.33 × 8 =
  12. 12.56 × 4 =
  13. 13.42 × 4 =
  14. 14.32 × 4 =
  15. 15.16 × 8 =
  16. 16.46 × 4 =
  17. 17.31 × 8 =
  18. 18.24 × 8 =
  19. 19.58 × 4 =
  20. 20.37 × 4 =
  21. 21.14 × 8 =
  22. 22.25 × 8 =
  23. 23.35 × 4 =
  24. 24.47 × 4 =
  25. 25.36 × 8 =
  26. 26.13 × 4 =
  27. 27.15 × 8 =
  28. 28.35 × 8 =
  29. 29.21 × 8 =
  30. 30.31 × 4 =
  31. 31.32 × 8 =
  32. 32.36 × 4 =
  33. 33.38 × 4 =
  34. 34.51 × 4 =
  35. 35.74 × 4 =
  36. 36.34 × 8 =
  37. 37.29 × 8 =
  38. 38.37 × 8 =
  39. 39.28 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 104
  2. 152
  3. 240
  4. 312
  5. 220
  6. 92
  7. 100
  8. 136
  9. 80
  10. 120
  11. 264
  12. 224
  13. 168
  14. 128
  15. 128
  16. 184
  17. 248
  18. 192
  19. 232
  20. 148
  21. 112
  22. 200
  23. 140
  24. 188
  25. 288
  26. 52
  27. 120
  28. 280
  29. 168
  30. 124
  31. 256
  32. 144
  33. 152
  34. 204
  35. 296
  36. 272
  37. 232
  38. 296
  39. 224
  40. 304

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