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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 918 · 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. 1.53 × 4 =
  2. 2.35 × 8 =
  3. 3.33 × 4 =
  4. 4.60 × 4 =
  5. 5.23 × 8 =
  6. 6.21 × 8 =
  7. 7.67 × 4 =
  8. 8.32 × 4 =
  9. 9.18 × 4 =
  10. 10.66 × 4 =
  11. 11.36 × 8 =
  12. 12.17 × 4 =
  13. 13.18 × 8 =
  14. 14.19 × 8 =
  15. 15.31 × 8 =
  16. 16.75 × 4 =
  17. 17.61 × 4 =
  18. 18.37 × 8 =
  19. 19.15 × 8 =
  20. 20.25 × 8 =
  21. 21.22 × 4 =
  22. 22.64 × 4 =
  23. 23.12 × 8 =
  24. 24.20 × 8 =
  25. 25.47 × 4 =
  26. 26.49 × 4 =
  27. 27.15 × 4 =
  28. 28.13 × 8 =
  29. 29.62 × 4 =
  30. 30.38 × 8 =
  31. 31.30 × 8 =
  32. 32.30 × 4 =
  33. 33.17 × 8 =
  34. 34.57 × 4 =
  35. 35.33 × 8 =
  36. 36.40 × 8 =
  37. 37.19 × 4 =
  38. 38.24 × 8 =
  39. 39.35 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 212
  2. 280
  3. 132
  4. 240
  5. 184
  6. 168
  7. 268
  8. 128
  9. 72
  10. 264
  11. 288
  12. 68
  13. 144
  14. 152
  15. 248
  16. 300
  17. 244
  18. 296
  19. 120
  20. 200
  21. 88
  22. 256
  23. 96
  24. 160
  25. 188
  26. 196
  27. 60
  28. 104
  29. 248
  30. 304
  31. 240
  32. 120
  33. 136
  34. 228
  35. 264
  36. 320
  37. 76
  38. 192
  39. 140
  40. 96

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