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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 452 · 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. 1.60 × 4 =
  2. 2.72 × 4 =
  3. 3.43 × 4 =
  4. 4.71 × 4 =
  5. 5.35 × 8 =
  6. 6.38 × 4 =
  7. 7.27 × 8 =
  8. 8.34 × 8 =
  9. 9.64 × 4 =
  10. 10.57 × 4 =
  11. 11.19 × 8 =
  12. 12.16 × 4 =
  13. 13.44 × 4 =
  14. 14.41 × 4 =
  15. 15.12 × 4 =
  16. 16.28 × 4 =
  17. 17.36 × 4 =
  18. 18.32 × 8 =
  19. 19.40 × 8 =
  20. 20.14 × 8 =
  21. 21.15 × 8 =
  22. 22.19 × 4 =
  23. 23.12 × 8 =
  24. 24.66 × 4 =
  25. 25.18 × 4 =
  26. 26.25 × 8 =
  27. 27.29 × 8 =
  28. 28.28 × 8 =
  29. 29.26 × 4 =
  30. 30.47 × 4 =
  31. 31.39 × 8 =
  32. 32.14 × 4 =
  33. 33.24 × 8 =
  34. 34.20 × 8 =
  35. 35.18 × 8 =
  36. 36.23 × 4 =
  37. 37.61 × 4 =
  38. 38.69 × 4 =
  39. 39.70 × 4 =
  40. 40.16 × 8 =

Answer key

  1. 240
  2. 288
  3. 172
  4. 284
  5. 280
  6. 152
  7. 216
  8. 272
  9. 256
  10. 228
  11. 152
  12. 64
  13. 176
  14. 164
  15. 48
  16. 112
  17. 144
  18. 256
  19. 320
  20. 112
  21. 120
  22. 76
  23. 96
  24. 264
  25. 72
  26. 200
  27. 232
  28. 224
  29. 104
  30. 188
  31. 312
  32. 56
  33. 192
  34. 160
  35. 144
  36. 92
  37. 244
  38. 276
  39. 280
  40. 128

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