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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 994 · 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. 1.30 × 4 =
  2. 2.49 × 4 =
  3. 3.14 × 4 =
  4. 4.19 × 8 =
  5. 5.32 × 4 =
  6. 6.20 × 8 =
  7. 7.21 × 8 =
  8. 8.20 × 4 =
  9. 9.41 × 4 =
  10. 10.35 × 8 =
  11. 11.33 × 8 =
  12. 12.15 × 8 =
  13. 13.29 × 8 =
  14. 14.28 × 8 =
  15. 15.16 × 4 =
  16. 16.47 × 4 =
  17. 17.17 × 8 =
  18. 18.59 × 4 =
  19. 19.27 × 8 =
  20. 20.24 × 4 =
  21. 21.14 × 8 =
  22. 22.22 × 4 =
  23. 23.25 × 8 =
  24. 24.18 × 8 =
  25. 25.46 × 4 =
  26. 26.16 × 8 =
  27. 27.32 × 8 =
  28. 28.31 × 8 =
  29. 29.12 × 4 =
  30. 30.51 × 4 =
  31. 31.63 × 4 =
  32. 32.74 × 4 =
  33. 33.13 × 4 =
  34. 34.39 × 4 =
  35. 35.66 × 4 =
  36. 36.26 × 8 =
  37. 37.55 × 4 =
  38. 38.38 × 4 =
  39. 39.21 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 120
  2. 196
  3. 56
  4. 152
  5. 128
  6. 160
  7. 168
  8. 80
  9. 164
  10. 280
  11. 264
  12. 120
  13. 232
  14. 224
  15. 64
  16. 188
  17. 136
  18. 236
  19. 216
  20. 96
  21. 112
  22. 88
  23. 200
  24. 144
  25. 184
  26. 128
  27. 256
  28. 248
  29. 48
  30. 204
  31. 252
  32. 296
  33. 52
  34. 156
  35. 264
  36. 208
  37. 220
  38. 152
  39. 84
  40. 108

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