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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 999 · 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. 1.19 × 8 =
  2. 2.64 × 4 =
  3. 3.13 × 8 =
  4. 4.25 × 8 =
  5. 5.58 × 4 =
  6. 6.63 × 4 =
  7. 7.27 × 8 =
  8. 8.36 × 8 =
  9. 9.49 × 4 =
  10. 10.44 × 4 =
  11. 11.18 × 4 =
  12. 12.32 × 8 =
  13. 13.18 × 8 =
  14. 14.16 × 8 =
  15. 15.47 × 4 =
  16. 16.26 × 4 =
  17. 17.36 × 4 =
  18. 18.14 × 8 =
  19. 19.30 × 8 =
  20. 20.56 × 4 =
  21. 21.28 × 8 =
  22. 22.40 × 4 =
  23. 23.71 × 4 =
  24. 24.27 × 4 =
  25. 25.39 × 8 =
  26. 26.23 × 8 =
  27. 27.26 × 8 =
  28. 28.22 × 8 =
  29. 29.45 × 4 =
  30. 30.15 × 4 =
  31. 31.66 × 4 =
  32. 32.31 × 4 =
  33. 33.40 × 8 =
  34. 34.43 × 4 =
  35. 35.62 × 4 =
  36. 36.73 × 4 =
  37. 37.20 × 8 =
  38. 38.60 × 4 =
  39. 39.31 × 8 =
  40. 40.42 × 4 =

Answer key

  1. 152
  2. 256
  3. 104
  4. 200
  5. 232
  6. 252
  7. 216
  8. 288
  9. 196
  10. 176
  11. 72
  12. 256
  13. 144
  14. 128
  15. 188
  16. 104
  17. 144
  18. 112
  19. 240
  20. 224
  21. 224
  22. 160
  23. 284
  24. 108
  25. 312
  26. 184
  27. 208
  28. 176
  29. 180
  30. 60
  31. 264
  32. 124
  33. 320
  34. 172
  35. 248
  36. 292
  37. 160
  38. 240
  39. 248
  40. 168

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