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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 775 · 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. 1.71 × 4 =
  2. 2.12 × 8 =
  3. 3.36 × 8 =
  4. 4.56 × 4 =
  5. 5.17 × 8 =
  6. 6.32 × 8 =
  7. 7.24 × 4 =
  8. 8.38 × 8 =
  9. 9.50 × 4 =
  10. 10.57 × 4 =
  11. 11.30 × 4 =
  12. 12.22 × 4 =
  13. 13.48 × 4 =
  14. 14.27 × 8 =
  15. 15.28 × 8 =
  16. 16.25 × 4 =
  17. 17.67 × 4 =
  18. 18.17 × 4 =
  19. 19.13 × 8 =
  20. 20.42 × 4 =
  21. 21.16 × 8 =
  22. 22.26 × 8 =
  23. 23.33 × 8 =
  24. 24.31 × 4 =
  25. 25.35 × 8 =
  26. 26.29 × 4 =
  27. 27.23 × 8 =
  28. 28.23 × 4 =
  29. 29.49 × 4 =
  30. 30.70 × 4 =
  31. 31.21 × 8 =
  32. 32.38 × 4 =
  33. 33.64 × 4 =
  34. 34.72 × 4 =
  35. 35.55 × 4 =
  36. 36.19 × 8 =
  37. 37.27 × 4 =
  38. 38.26 × 4 =
  39. 39.37 × 4 =
  40. 40.37 × 8 =

Answer key

  1. 284
  2. 96
  3. 288
  4. 224
  5. 136
  6. 256
  7. 96
  8. 304
  9. 200
  10. 228
  11. 120
  12. 88
  13. 192
  14. 216
  15. 224
  16. 100
  17. 268
  18. 68
  19. 104
  20. 168
  21. 128
  22. 208
  23. 264
  24. 124
  25. 280
  26. 116
  27. 184
  28. 92
  29. 196
  30. 280
  31. 168
  32. 152
  33. 256
  34. 288
  35. 220
  36. 152
  37. 108
  38. 104
  39. 148
  40. 296

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