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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 974 · 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. 1.23 × 4 =
  2. 2.22 × 4 =
  3. 3.26 × 4 =
  4. 4.42 × 4 =
  5. 5.21 × 8 =
  6. 6.40 × 4 =
  7. 7.69 × 4 =
  8. 8.29 × 8 =
  9. 9.30 × 8 =
  10. 10.20 × 4 =
  11. 11.47 × 4 =
  12. 12.32 × 4 =
  13. 13.29 × 4 =
  14. 14.55 × 4 =
  15. 15.23 × 8 =
  16. 16.15 × 4 =
  17. 17.46 × 4 =
  18. 18.14 × 8 =
  19. 19.52 × 4 =
  20. 20.24 × 8 =
  21. 21.72 × 4 =
  22. 22.49 × 4 =
  23. 23.43 × 4 =
  24. 24.18 × 8 =
  25. 25.39 × 8 =
  26. 26.20 × 8 =
  27. 27.25 × 4 =
  28. 28.12 × 4 =
  29. 29.35 × 8 =
  30. 30.17 × 4 =
  31. 31.14 × 4 =
  32. 32.33 × 8 =
  33. 33.64 × 4 =
  34. 34.28 × 8 =
  35. 35.54 × 4 =
  36. 36.50 × 4 =
  37. 37.25 × 8 =
  38. 38.13 × 8 =
  39. 39.18 × 4 =
  40. 40.34 × 8 =

Answer key

  1. 92
  2. 88
  3. 104
  4. 168
  5. 168
  6. 160
  7. 276
  8. 232
  9. 240
  10. 80
  11. 188
  12. 128
  13. 116
  14. 220
  15. 184
  16. 60
  17. 184
  18. 112
  19. 208
  20. 192
  21. 288
  22. 196
  23. 172
  24. 144
  25. 312
  26. 160
  27. 100
  28. 48
  29. 280
  30. 68
  31. 56
  32. 264
  33. 256
  34. 224
  35. 216
  36. 200
  37. 200
  38. 104
  39. 72
  40. 272

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