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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 543 · 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. 1.12 × 8 =
  2. 2.27 × 8 =
  3. 3.20 × 4 =
  4. 4.37 × 8 =
  5. 5.28 × 8 =
  6. 6.26 × 4 =
  7. 7.13 × 8 =
  8. 8.16 × 8 =
  9. 9.25 × 8 =
  10. 10.31 × 4 =
  11. 11.60 × 4 =
  12. 12.51 × 4 =
  13. 13.65 × 4 =
  14. 14.14 × 4 =
  15. 15.46 × 4 =
  16. 16.41 × 4 =
  17. 17.18 × 8 =
  18. 18.37 × 4 =
  19. 19.62 × 4 =
  20. 20.17 × 8 =
  21. 21.40 × 8 =
  22. 22.18 × 4 =
  23. 23.24 × 8 =
  24. 24.35 × 8 =
  25. 25.53 × 4 =
  26. 26.43 × 4 =
  27. 27.39 × 8 =
  28. 28.15 × 8 =
  29. 29.48 × 4 =
  30. 30.25 × 4 =
  31. 31.38 × 4 =
  32. 32.26 × 8 =
  33. 33.27 × 4 =
  34. 34.21 × 4 =
  35. 35.19 × 8 =
  36. 36.38 × 8 =
  37. 37.68 × 4 =
  38. 38.70 × 4 =
  39. 39.35 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 96
  2. 216
  3. 80
  4. 296
  5. 224
  6. 104
  7. 104
  8. 128
  9. 200
  10. 124
  11. 240
  12. 204
  13. 260
  14. 56
  15. 184
  16. 164
  17. 144
  18. 148
  19. 248
  20. 136
  21. 320
  22. 72
  23. 192
  24. 280
  25. 212
  26. 172
  27. 312
  28. 120
  29. 192
  30. 100
  31. 152
  32. 208
  33. 108
  34. 84
  35. 152
  36. 304
  37. 272
  38. 280
  39. 140
  40. 252

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