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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 595 · 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. 1.34 × 4 =
  2. 2.38 × 4 =
  3. 3.40 × 4 =
  4. 4.39 × 8 =
  5. 5.15 × 8 =
  6. 6.19 × 8 =
  7. 7.20 × 4 =
  8. 8.69 × 4 =
  9. 9.35 × 4 =
  10. 10.36 × 4 =
  11. 11.48 × 4 =
  12. 12.21 × 8 =
  13. 13.29 × 8 =
  14. 14.56 × 4 =
  15. 15.32 × 4 =
  16. 16.27 × 8 =
  17. 17.37 × 8 =
  18. 18.17 × 8 =
  19. 19.29 × 4 =
  20. 20.55 × 4 =
  21. 21.49 × 4 =
  22. 22.13 × 4 =
  23. 23.23 × 4 =
  24. 24.39 × 4 =
  25. 25.35 × 8 =
  26. 26.28 × 8 =
  27. 27.15 × 4 =
  28. 28.36 × 8 =
  29. 29.50 × 4 =
  30. 30.31 × 8 =
  31. 31.33 × 8 =
  32. 32.27 × 4 =
  33. 33.23 × 8 =
  34. 34.18 × 8 =
  35. 35.24 × 8 =
  36. 36.25 × 4 =
  37. 37.64 × 4 =
  38. 38.73 × 4 =
  39. 39.40 × 8 =
  40. 40.16 × 8 =

Answer key

  1. 136
  2. 152
  3. 160
  4. 312
  5. 120
  6. 152
  7. 80
  8. 276
  9. 140
  10. 144
  11. 192
  12. 168
  13. 232
  14. 224
  15. 128
  16. 216
  17. 296
  18. 136
  19. 116
  20. 220
  21. 196
  22. 52
  23. 92
  24. 156
  25. 280
  26. 224
  27. 60
  28. 288
  29. 200
  30. 248
  31. 264
  32. 108
  33. 184
  34. 144
  35. 192
  36. 100
  37. 256
  38. 292
  39. 320
  40. 128

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