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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 722 · 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. 1.18 × 4 =
  2. 2.21 × 8 =
  3. 3.40 × 8 =
  4. 4.73 × 4 =
  5. 5.13 × 4 =
  6. 6.64 × 4 =
  7. 7.12 × 8 =
  8. 8.45 × 4 =
  9. 9.36 × 8 =
  10. 10.29 × 4 =
  11. 11.27 × 8 =
  12. 12.37 × 4 =
  13. 13.20 × 4 =
  14. 14.67 × 4 =
  15. 15.41 × 4 =
  16. 16.40 × 4 =
  17. 17.43 × 4 =
  18. 18.72 × 4 =
  19. 19.29 × 8 =
  20. 20.15 × 8 =
  21. 21.52 × 4 =
  22. 22.31 × 4 =
  23. 23.46 × 4 =
  24. 24.39 × 8 =
  25. 25.56 × 4 =
  26. 26.22 × 4 =
  27. 27.16 × 8 =
  28. 28.38 × 8 =
  29. 29.49 × 4 =
  30. 30.18 × 8 =
  31. 31.13 × 8 =
  32. 32.75 × 4 =
  33. 33.34 × 8 =
  34. 34.17 × 8 =
  35. 35.20 × 8 =
  36. 36.15 × 4 =
  37. 37.19 × 8 =
  38. 38.66 × 4 =
  39. 39.35 × 8 =
  40. 40.31 × 8 =

Answer key

  1. 72
  2. 168
  3. 320
  4. 292
  5. 52
  6. 256
  7. 96
  8. 180
  9. 288
  10. 116
  11. 216
  12. 148
  13. 80
  14. 268
  15. 164
  16. 160
  17. 172
  18. 288
  19. 232
  20. 120
  21. 208
  22. 124
  23. 184
  24. 312
  25. 224
  26. 88
  27. 128
  28. 304
  29. 196
  30. 144
  31. 104
  32. 300
  33. 272
  34. 136
  35. 160
  36. 60
  37. 152
  38. 264
  39. 280
  40. 248

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