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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 870 · 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. 1.52 × 4 =
  2. 2.29 × 8 =
  3. 3.22 × 4 =
  4. 4.28 × 8 =
  5. 5.34 × 8 =
  6. 6.75 × 4 =
  7. 7.37 × 8 =
  8. 8.69 × 4 =
  9. 9.14 × 4 =
  10. 10.60 × 4 =
  11. 11.50 × 4 =
  12. 12.15 × 8 =
  13. 13.24 × 4 =
  14. 14.43 × 4 =
  15. 15.23 × 8 =
  16. 16.32 × 8 =
  17. 17.71 × 4 =
  18. 18.17 × 8 =
  19. 19.56 × 4 =
  20. 20.13 × 8 =
  21. 21.44 × 4 =
  22. 22.35 × 8 =
  23. 23.30 × 8 =
  24. 24.36 × 8 =
  25. 25.72 × 4 =
  26. 26.18 × 4 =
  27. 27.31 × 4 =
  28. 28.19 × 8 =
  29. 29.64 × 4 =
  30. 30.18 × 8 =
  31. 31.33 × 8 =
  32. 32.14 × 8 =
  33. 33.48 × 4 =
  34. 34.20 × 8 =
  35. 35.21 × 4 =
  36. 36.31 × 8 =
  37. 37.12 × 8 =
  38. 38.40 × 8 =
  39. 39.16 × 8 =
  40. 40.21 × 8 =

Answer key

  1. 208
  2. 232
  3. 88
  4. 224
  5. 272
  6. 300
  7. 296
  8. 276
  9. 56
  10. 240
  11. 200
  12. 120
  13. 96
  14. 172
  15. 184
  16. 256
  17. 284
  18. 136
  19. 224
  20. 104
  21. 176
  22. 280
  23. 240
  24. 288
  25. 288
  26. 72
  27. 124
  28. 152
  29. 256
  30. 144
  31. 264
  32. 112
  33. 192
  34. 160
  35. 84
  36. 248
  37. 96
  38. 320
  39. 128
  40. 168

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