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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 170 · 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. 1.48 × 4 =
  2. 2.38 × 8 =
  3. 3.40 × 8 =
  4. 4.12 × 8 =
  5. 5.36 × 4 =
  6. 6.71 × 4 =
  7. 7.73 × 4 =
  8. 8.60 × 4 =
  9. 9.14 × 8 =
  10. 10.16 × 8 =
  11. 11.12 × 4 =
  12. 12.23 × 8 =
  13. 13.27 × 8 =
  14. 14.28 × 4 =
  15. 15.18 × 8 =
  16. 16.19 × 4 =
  17. 17.42 × 4 =
  18. 18.20 × 8 =
  19. 19.39 × 8 =
  20. 20.37 × 8 =
  21. 21.34 × 8 =
  22. 22.46 × 4 =
  23. 23.20 × 4 =
  24. 24.51 × 4 =
  25. 25.21 × 8 =
  26. 26.13 × 4 =
  27. 27.22 × 4 =
  28. 28.63 × 4 =
  29. 29.24 × 8 =
  30. 30.19 × 8 =
  31. 31.58 × 4 =
  32. 32.28 × 8 =
  33. 33.55 × 4 =
  34. 34.24 × 4 =
  35. 35.38 × 4 =
  36. 36.15 × 8 =
  37. 37.23 × 4 =
  38. 38.56 × 4 =
  39. 39.75 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 192
  2. 304
  3. 320
  4. 96
  5. 144
  6. 284
  7. 292
  8. 240
  9. 112
  10. 128
  11. 48
  12. 184
  13. 216
  14. 112
  15. 144
  16. 76
  17. 168
  18. 160
  19. 312
  20. 296
  21. 272
  22. 184
  23. 80
  24. 204
  25. 168
  26. 52
  27. 88
  28. 252
  29. 192
  30. 152
  31. 232
  32. 224
  33. 220
  34. 96
  35. 152
  36. 120
  37. 92
  38. 224
  39. 300
  40. 148

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