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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 868 · 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. 1.63 × 4 =
  2. 2.38 × 8 =
  3. 3.42 × 4 =
  4. 4.49 × 4 =
  5. 5.18 × 8 =
  6. 6.13 × 8 =
  7. 7.35 × 8 =
  8. 8.56 × 4 =
  9. 9.19 × 8 =
  10. 10.22 × 4 =
  11. 11.69 × 4 =
  12. 12.66 × 4 =
  13. 13.71 × 4 =
  14. 14.12 × 8 =
  15. 15.57 × 4 =
  16. 16.72 × 4 =
  17. 17.23 × 4 =
  18. 18.15 × 8 =
  19. 19.58 × 4 =
  20. 20.41 × 4 =
  21. 21.34 × 4 =
  22. 22.26 × 4 =
  23. 23.40 × 4 =
  24. 24.33 × 8 =
  25. 25.22 × 8 =
  26. 26.30 × 4 =
  27. 27.34 × 8 =
  28. 28.54 × 4 =
  29. 29.32 × 4 =
  30. 30.44 × 4 =
  31. 31.39 × 4 =
  32. 32.14 × 8 =
  33. 33.35 × 4 =
  34. 34.27 × 8 =
  35. 35.31 × 8 =
  36. 36.33 × 4 =
  37. 37.20 × 8 =
  38. 38.21 × 8 =
  39. 39.21 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 252
  2. 304
  3. 168
  4. 196
  5. 144
  6. 104
  7. 280
  8. 224
  9. 152
  10. 88
  11. 276
  12. 264
  13. 284
  14. 96
  15. 228
  16. 288
  17. 92
  18. 120
  19. 232
  20. 164
  21. 136
  22. 104
  23. 160
  24. 264
  25. 176
  26. 120
  27. 272
  28. 216
  29. 128
  30. 176
  31. 156
  32. 112
  33. 140
  34. 216
  35. 248
  36. 132
  37. 160
  38. 168
  39. 84
  40. 232

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