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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 344 · 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. 1.38 × 4 =
  2. 2.20 × 8 =
  3. 3.12 × 8 =
  4. 4.20 × 4 =
  5. 5.29 × 8 =
  6. 6.53 × 4 =
  7. 7.44 × 4 =
  8. 8.25 × 8 =
  9. 9.48 × 4 =
  10. 10.27 × 4 =
  11. 11.40 × 4 =
  12. 12.73 × 4 =
  13. 13.59 × 4 =
  14. 14.13 × 4 =
  15. 15.37 × 8 =
  16. 16.22 × 4 =
  17. 17.72 × 4 =
  18. 18.62 × 4 =
  19. 19.13 × 8 =
  20. 20.75 × 4 =
  21. 21.36 × 4 =
  22. 22.21 × 4 =
  23. 23.64 × 4 =
  24. 24.24 × 8 =
  25. 25.19 × 8 =
  26. 26.60 × 4 =
  27. 27.12 × 4 =
  28. 28.42 × 4 =
  29. 29.19 × 4 =
  30. 30.18 × 8 =
  31. 31.26 × 8 =
  32. 32.71 × 4 =
  33. 33.16 × 8 =
  34. 34.32 × 4 =
  35. 35.37 × 4 =
  36. 36.39 × 8 =
  37. 37.28 × 8 =
  38. 38.30 × 8 =
  39. 39.34 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 152
  2. 160
  3. 96
  4. 80
  5. 232
  6. 212
  7. 176
  8. 200
  9. 192
  10. 108
  11. 160
  12. 292
  13. 236
  14. 52
  15. 296
  16. 88
  17. 288
  18. 248
  19. 104
  20. 300
  21. 144
  22. 84
  23. 256
  24. 192
  25. 152
  26. 240
  27. 48
  28. 168
  29. 76
  30. 144
  31. 208
  32. 284
  33. 128
  34. 128
  35. 148
  36. 312
  37. 224
  38. 240
  39. 136
  40. 140

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