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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 940 · 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. 1.74 × 4 =
  2. 2.75 × 4 =
  3. 3.13 × 8 =
  4. 4.47 × 4 =
  5. 5.20 × 4 =
  6. 6.12 × 8 =
  7. 7.72 × 4 =
  8. 8.15 × 8 =
  9. 9.42 × 4 =
  10. 10.18 × 4 =
  11. 11.27 × 4 =
  12. 12.31 × 4 =
  13. 13.21 × 4 =
  14. 14.18 × 8 =
  15. 15.30 × 8 =
  16. 16.39 × 8 =
  17. 17.53 × 4 =
  18. 18.50 × 4 =
  19. 19.73 × 4 =
  20. 20.23 × 4 =
  21. 21.21 × 8 =
  22. 22.32 × 4 =
  23. 23.16 × 8 =
  24. 24.65 × 4 =
  25. 25.25 × 8 =
  26. 26.43 × 4 =
  27. 27.37 × 8 =
  28. 28.24 × 4 =
  29. 29.17 × 8 =
  30. 30.71 × 4 =
  31. 31.19 × 8 =
  32. 32.29 × 4 =
  33. 33.64 × 4 =
  34. 34.33 × 8 =
  35. 35.45 × 4 =
  36. 36.29 × 8 =
  37. 37.34 × 8 =
  38. 38.24 × 8 =
  39. 39.20 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 296
  2. 300
  3. 104
  4. 188
  5. 80
  6. 96
  7. 288
  8. 120
  9. 168
  10. 72
  11. 108
  12. 124
  13. 84
  14. 144
  15. 240
  16. 312
  17. 212
  18. 200
  19. 292
  20. 92
  21. 168
  22. 128
  23. 128
  24. 260
  25. 200
  26. 172
  27. 296
  28. 96
  29. 136
  30. 284
  31. 152
  32. 116
  33. 256
  34. 264
  35. 180
  36. 232
  37. 272
  38. 192
  39. 160
  40. 288

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