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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 982 · 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. 1.59 × 4 =
  2. 2.24 × 4 =
  3. 3.34 × 4 =
  4. 4.22 × 8 =
  5. 5.72 × 4 =
  6. 6.37 × 4 =
  7. 7.43 × 4 =
  8. 8.15 × 8 =
  9. 9.54 × 4 =
  10. 10.23 × 8 =
  11. 11.28 × 8 =
  12. 12.35 × 8 =
  13. 13.33 × 8 =
  14. 14.53 × 4 =
  15. 15.23 × 4 =
  16. 16.66 × 4 =
  17. 17.36 × 8 =
  18. 18.12 × 8 =
  19. 19.30 × 8 =
  20. 20.32 × 4 =
  21. 21.37 × 8 =
  22. 22.47 × 4 =
  23. 23.64 × 4 =
  24. 24.18 × 4 =
  25. 25.24 × 8 =
  26. 26.38 × 8 =
  27. 27.13 × 8 =
  28. 28.16 × 4 =
  29. 29.74 × 4 =
  30. 30.40 × 8 =
  31. 31.50 × 4 =
  32. 32.16 × 8 =
  33. 33.29 × 8 =
  34. 34.36 × 4 =
  35. 35.48 × 4 =
  36. 36.32 × 8 =
  37. 37.18 × 8 =
  38. 38.19 × 8 =
  39. 39.39 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 236
  2. 96
  3. 136
  4. 176
  5. 288
  6. 148
  7. 172
  8. 120
  9. 216
  10. 184
  11. 224
  12. 280
  13. 264
  14. 212
  15. 92
  16. 264
  17. 288
  18. 96
  19. 240
  20. 128
  21. 296
  22. 188
  23. 256
  24. 72
  25. 192
  26. 304
  27. 104
  28. 64
  29. 296
  30. 320
  31. 200
  32. 128
  33. 232
  34. 144
  35. 192
  36. 256
  37. 144
  38. 152
  39. 312
  40. 200

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