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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 976 · 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. 1.25 × 8 =
  2. 2.66 × 4 =
  3. 3.54 × 4 =
  4. 4.35 × 8 =
  5. 5.36 × 8 =
  6. 6.61 × 4 =
  7. 7.34 × 4 =
  8. 8.13 × 4 =
  9. 9.20 × 8 =
  10. 10.49 × 4 =
  11. 11.30 × 4 =
  12. 12.16 × 4 =
  13. 13.26 × 8 =
  14. 14.20 × 4 =
  15. 15.33 × 8 =
  16. 16.29 × 8 =
  17. 17.13 × 8 =
  18. 18.16 × 8 =
  19. 19.43 × 4 =
  20. 20.14 × 8 =
  21. 21.67 × 4 =
  22. 22.40 × 4 =
  23. 23.50 × 4 =
  24. 24.27 × 4 =
  25. 25.30 × 8 =
  26. 26.41 × 4 =
  27. 27.15 × 8 =
  28. 28.23 × 4 =
  29. 29.25 × 4 =
  30. 30.14 × 4 =
  31. 31.17 × 8 =
  32. 32.23 × 8 =
  33. 33.18 × 4 =
  34. 34.53 × 4 =
  35. 35.12 × 8 =
  36. 36.22 × 4 =
  37. 37.22 × 8 =
  38. 38.28 × 8 =
  39. 39.68 × 4 =
  40. 40.33 × 4 =

Answer key

  1. 200
  2. 264
  3. 216
  4. 280
  5. 288
  6. 244
  7. 136
  8. 52
  9. 160
  10. 196
  11. 120
  12. 64
  13. 208
  14. 80
  15. 264
  16. 232
  17. 104
  18. 128
  19. 172
  20. 112
  21. 268
  22. 160
  23. 200
  24. 108
  25. 240
  26. 164
  27. 120
  28. 92
  29. 100
  30. 56
  31. 136
  32. 184
  33. 72
  34. 212
  35. 96
  36. 88
  37. 176
  38. 224
  39. 272
  40. 132

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