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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 936 · 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. 1.22 × 8 =
  2. 2.17 × 8 =
  3. 3.16 × 8 =
  4. 4.13 × 4 =
  5. 5.53 × 4 =
  6. 6.63 × 4 =
  7. 7.25 × 8 =
  8. 8.15 × 8 =
  9. 9.55 × 4 =
  10. 10.14 × 8 =
  11. 11.38 × 8 =
  12. 12.13 × 8 =
  13. 13.24 × 8 =
  14. 14.40 × 4 =
  15. 15.45 × 4 =
  16. 16.31 × 4 =
  17. 17.48 × 4 =
  18. 18.33 × 8 =
  19. 19.70 × 4 =
  20. 20.21 × 4 =
  21. 21.52 × 4 =
  22. 22.32 × 8 =
  23. 23.74 × 4 =
  24. 24.26 × 8 =
  25. 25.19 × 4 =
  26. 26.28 × 4 =
  27. 27.26 × 4 =
  28. 28.40 × 8 =
  29. 29.31 × 8 =
  30. 30.50 × 4 =
  31. 31.68 × 4 =
  32. 32.34 × 4 =
  33. 33.30 × 8 =
  34. 34.37 × 8 =
  35. 35.35 × 8 =
  36. 36.16 × 4 =
  37. 37.49 × 4 =
  38. 38.25 × 4 =
  39. 39.54 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 176
  2. 136
  3. 128
  4. 52
  5. 212
  6. 252
  7. 200
  8. 120
  9. 220
  10. 112
  11. 304
  12. 104
  13. 192
  14. 160
  15. 180
  16. 124
  17. 192
  18. 264
  19. 280
  20. 84
  21. 208
  22. 256
  23. 296
  24. 208
  25. 76
  26. 112
  27. 104
  28. 320
  29. 248
  30. 200
  31. 272
  32. 136
  33. 240
  34. 296
  35. 280
  36. 64
  37. 196
  38. 100
  39. 216
  40. 232

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