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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 948 · 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. 1.37 × 4 =
  2. 2.24 × 4 =
  3. 3.40 × 4 =
  4. 4.22 × 8 =
  5. 5.46 × 4 =
  6. 6.66 × 4 =
  7. 7.48 × 4 =
  8. 8.31 × 4 =
  9. 9.18 × 8 =
  10. 10.45 × 4 =
  11. 11.38 × 8 =
  12. 12.71 × 4 =
  13. 13.20 × 8 =
  14. 14.35 × 8 =
  15. 15.23 × 8 =
  16. 16.70 × 4 =
  17. 17.15 × 4 =
  18. 18.25 × 8 =
  19. 19.64 × 4 =
  20. 20.39 × 8 =
  21. 21.32 × 4 =
  22. 22.13 × 4 =
  23. 23.27 × 8 =
  24. 24.59 × 4 =
  25. 25.34 × 8 =
  26. 26.39 × 4 =
  27. 27.14 × 8 =
  28. 28.57 × 4 =
  29. 29.13 × 8 =
  30. 30.29 × 8 =
  31. 31.75 × 4 =
  32. 32.32 × 8 =
  33. 33.63 × 4 =
  34. 34.28 × 8 =
  35. 35.30 × 8 =
  36. 36.20 × 4 =
  37. 37.38 × 4 =
  38. 38.23 × 4 =
  39. 39.36 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 148
  2. 96
  3. 160
  4. 176
  5. 184
  6. 264
  7. 192
  8. 124
  9. 144
  10. 180
  11. 304
  12. 284
  13. 160
  14. 280
  15. 184
  16. 280
  17. 60
  18. 200
  19. 256
  20. 312
  21. 128
  22. 52
  23. 216
  24. 236
  25. 272
  26. 156
  27. 112
  28. 228
  29. 104
  30. 232
  31. 300
  32. 256
  33. 252
  34. 224
  35. 240
  36. 80
  37. 152
  38. 92
  39. 288
  40. 88

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