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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 952 · 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. 1.34 × 8 =
  2. 2.12 × 4 =
  3. 3.52 × 4 =
  4. 4.15 × 8 =
  5. 5.31 × 4 =
  6. 6.24 × 8 =
  7. 7.35 × 8 =
  8. 8.17 × 8 =
  9. 9.30 × 8 =
  10. 10.33 × 8 =
  11. 11.41 × 4 =
  12. 12.16 × 8 =
  13. 13.40 × 4 =
  14. 14.67 × 4 =
  15. 15.20 × 8 =
  16. 16.24 × 4 =
  17. 17.15 × 4 =
  18. 18.22 × 8 =
  19. 19.60 × 4 =
  20. 20.64 × 4 =
  21. 21.72 × 4 =
  22. 22.28 × 4 =
  23. 23.58 × 4 =
  24. 24.74 × 4 =
  25. 25.21 × 8 =
  26. 26.34 × 4 =
  27. 27.50 × 4 =
  28. 28.21 × 4 =
  29. 29.14 × 8 =
  30. 30.48 × 4 =
  31. 31.27 × 8 =
  32. 32.23 × 4 =
  33. 33.28 × 8 =
  34. 34.68 × 4 =
  35. 35.37 × 4 =
  36. 36.51 × 4 =
  37. 37.17 × 4 =
  38. 38.12 × 8 =
  39. 39.39 × 8 =
  40. 40.20 × 4 =

Answer key

  1. 272
  2. 48
  3. 208
  4. 120
  5. 124
  6. 192
  7. 280
  8. 136
  9. 240
  10. 264
  11. 164
  12. 128
  13. 160
  14. 268
  15. 160
  16. 96
  17. 60
  18. 176
  19. 240
  20. 256
  21. 288
  22. 112
  23. 232
  24. 296
  25. 168
  26. 136
  27. 200
  28. 84
  29. 112
  30. 192
  31. 216
  32. 92
  33. 224
  34. 272
  35. 148
  36. 204
  37. 68
  38. 96
  39. 312
  40. 80

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