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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 579 · 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. 1.19 × 4 =
  2. 2.19 × 8 =
  3. 3.64 × 4 =
  4. 4.40 × 8 =
  5. 5.70 × 4 =
  6. 6.15 × 8 =
  7. 7.36 × 4 =
  8. 8.12 × 8 =
  9. 9.12 × 4 =
  10. 10.75 × 4 =
  11. 11.31 × 4 =
  12. 12.26 × 4 =
  13. 13.50 × 4 =
  14. 14.27 × 4 =
  15. 15.48 × 4 =
  16. 16.22 × 4 =
  17. 17.40 × 4 =
  18. 18.25 × 4 =
  19. 19.58 × 4 =
  20. 20.30 × 8 =
  21. 21.21 × 8 =
  22. 22.20 × 8 =
  23. 23.29 × 4 =
  24. 24.32 × 8 =
  25. 25.22 × 8 =
  26. 26.34 × 8 =
  27. 27.23 × 8 =
  28. 28.24 × 8 =
  29. 29.38 × 4 =
  30. 30.14 × 4 =
  31. 31.15 × 4 =
  32. 32.53 × 4 =
  33. 33.69 × 4 =
  34. 34.65 × 4 =
  35. 35.25 × 8 =
  36. 36.37 × 4 =
  37. 37.17 × 8 =
  38. 38.46 × 4 =
  39. 39.38 × 8 =
  40. 40.61 × 4 =

Answer key

  1. 76
  2. 152
  3. 256
  4. 320
  5. 280
  6. 120
  7. 144
  8. 96
  9. 48
  10. 300
  11. 124
  12. 104
  13. 200
  14. 108
  15. 192
  16. 88
  17. 160
  18. 100
  19. 232
  20. 240
  21. 168
  22. 160
  23. 116
  24. 256
  25. 176
  26. 272
  27. 184
  28. 192
  29. 152
  30. 56
  31. 60
  32. 212
  33. 276
  34. 260
  35. 200
  36. 148
  37. 136
  38. 184
  39. 304
  40. 244

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