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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 587 · 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. 1.56 × 4 =
  2. 2.33 × 4 =
  3. 3.30 × 4 =
  4. 4.74 × 4 =
  5. 5.30 × 8 =
  6. 6.18 × 4 =
  7. 7.24 × 4 =
  8. 8.19 × 8 =
  9. 9.17 × 8 =
  10. 10.37 × 8 =
  11. 11.17 × 4 =
  12. 12.40 × 8 =
  13. 13.29 × 8 =
  14. 14.58 × 4 =
  15. 15.20 × 4 =
  16. 16.36 × 8 =
  17. 17.50 × 4 =
  18. 18.59 × 4 =
  19. 19.22 × 4 =
  20. 20.38 × 8 =
  21. 21.69 × 4 =
  22. 22.15 × 8 =
  23. 23.55 × 4 =
  24. 24.70 × 4 =
  25. 25.35 × 8 =
  26. 26.22 × 8 =
  27. 27.38 × 4 =
  28. 28.20 × 8 =
  29. 29.12 × 8 =
  30. 30.14 × 8 =
  31. 31.51 × 4 =
  32. 32.34 × 8 =
  33. 33.26 × 4 =
  34. 34.32 × 4 =
  35. 35.44 × 4 =
  36. 36.26 × 8 =
  37. 37.16 × 4 =
  38. 38.40 × 4 =
  39. 39.62 × 4 =
  40. 40.48 × 4 =

Answer key

  1. 224
  2. 132
  3. 120
  4. 296
  5. 240
  6. 72
  7. 96
  8. 152
  9. 136
  10. 296
  11. 68
  12. 320
  13. 232
  14. 232
  15. 80
  16. 288
  17. 200
  18. 236
  19. 88
  20. 304
  21. 276
  22. 120
  23. 220
  24. 280
  25. 280
  26. 176
  27. 152
  28. 160
  29. 96
  30. 112
  31. 204
  32. 272
  33. 104
  34. 128
  35. 176
  36. 208
  37. 64
  38. 160
  39. 248
  40. 192

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