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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 930 · 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. 1.20 × 8 =
  2. 2.61 × 4 =
  3. 3.51 × 4 =
  4. 4.16 × 8 =
  5. 5.36 × 4 =
  6. 6.54 × 4 =
  7. 7.19 × 8 =
  8. 8.33 × 8 =
  9. 9.18 × 8 =
  10. 10.64 × 4 =
  11. 11.23 × 4 =
  12. 12.39 × 8 =
  13. 13.27 × 4 =
  14. 14.22 × 4 =
  15. 15.22 × 8 =
  16. 16.70 × 4 =
  17. 17.21 × 8 =
  18. 18.28 × 8 =
  19. 19.23 × 8 =
  20. 20.41 × 4 =
  21. 21.12 × 8 =
  22. 22.67 × 4 =
  23. 23.58 × 4 =
  24. 24.48 × 4 =
  25. 25.60 × 4 =
  26. 26.45 × 4 =
  27. 27.34 × 4 =
  28. 28.56 × 4 =
  29. 29.28 × 4 =
  30. 30.46 × 4 =
  31. 31.33 × 4 =
  32. 32.47 × 4 =
  33. 33.74 × 4 =
  34. 34.14 × 8 =
  35. 35.49 × 4 =
  36. 36.13 × 8 =
  37. 37.44 × 4 =
  38. 38.25 × 8 =
  39. 39.18 × 4 =
  40. 40.42 × 4 =

Answer key

  1. 160
  2. 244
  3. 204
  4. 128
  5. 144
  6. 216
  7. 152
  8. 264
  9. 144
  10. 256
  11. 92
  12. 312
  13. 108
  14. 88
  15. 176
  16. 280
  17. 168
  18. 224
  19. 184
  20. 164
  21. 96
  22. 268
  23. 232
  24. 192
  25. 240
  26. 180
  27. 136
  28. 224
  29. 112
  30. 184
  31. 132
  32. 188
  33. 296
  34. 112
  35. 196
  36. 104
  37. 176
  38. 200
  39. 72
  40. 168

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