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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 933 · 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. 1.54 × 4 =
  2. 2.22 × 4 =
  3. 3.12 × 4 =
  4. 4.17 × 8 =
  5. 5.25 × 8 =
  6. 6.44 × 4 =
  7. 7.17 × 4 =
  8. 8.24 × 4 =
  9. 9.52 × 4 =
  10. 10.27 × 4 =
  11. 11.29 × 8 =
  12. 12.49 × 4 =
  13. 13.26 × 8 =
  14. 14.14 × 4 =
  15. 15.32 × 4 =
  16. 16.13 × 8 =
  17. 17.24 × 8 =
  18. 18.32 × 8 =
  19. 19.47 × 4 =
  20. 20.15 × 8 =
  21. 21.61 × 4 =
  22. 22.12 × 8 =
  23. 23.22 × 8 =
  24. 24.35 × 4 =
  25. 25.53 × 4 =
  26. 26.55 × 4 =
  27. 27.46 × 4 =
  28. 28.35 × 8 =
  29. 29.57 × 4 =
  30. 30.18 × 4 =
  31. 31.30 × 4 =
  32. 32.28 × 4 =
  33. 33.13 × 4 =
  34. 34.42 × 4 =
  35. 35.38 × 8 =
  36. 36.72 × 4 =
  37. 37.38 × 4 =
  38. 38.14 × 8 =
  39. 39.39 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 216
  2. 88
  3. 48
  4. 136
  5. 200
  6. 176
  7. 68
  8. 96
  9. 208
  10. 108
  11. 232
  12. 196
  13. 208
  14. 56
  15. 128
  16. 104
  17. 192
  18. 256
  19. 188
  20. 120
  21. 244
  22. 96
  23. 176
  24. 140
  25. 212
  26. 220
  27. 184
  28. 280
  29. 228
  30. 72
  31. 120
  32. 112
  33. 52
  34. 168
  35. 304
  36. 288
  37. 152
  38. 112
  39. 312
  40. 288

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