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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 419 · 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. 1.27 × 8 =
  2. 2.63 × 4 =
  3. 3.25 × 8 =
  4. 4.25 × 4 =
  5. 5.12 × 8 =
  6. 6.16 × 4 =
  7. 7.49 × 4 =
  8. 8.19 × 8 =
  9. 9.30 × 8 =
  10. 10.22 × 4 =
  11. 11.17 × 4 =
  12. 12.61 × 4 =
  13. 13.28 × 8 =
  14. 14.56 × 4 =
  15. 15.48 × 4 =
  16. 16.65 × 4 =
  17. 17.14 × 4 =
  18. 18.40 × 8 =
  19. 19.32 × 4 =
  20. 20.53 × 4 =
  21. 21.13 × 8 =
  22. 22.35 × 4 =
  23. 23.14 × 8 =
  24. 24.15 × 8 =
  25. 25.71 × 4 =
  26. 26.16 × 8 =
  27. 27.38 × 4 =
  28. 28.24 × 8 =
  29. 29.46 × 4 =
  30. 30.39 × 8 =
  31. 31.42 × 4 =
  32. 32.34 × 4 =
  33. 33.29 × 8 =
  34. 34.51 × 4 =
  35. 35.20 × 4 =
  36. 36.39 × 4 =
  37. 37.26 × 4 =
  38. 38.37 × 8 =
  39. 39.75 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 216
  2. 252
  3. 200
  4. 100
  5. 96
  6. 64
  7. 196
  8. 152
  9. 240
  10. 88
  11. 68
  12. 244
  13. 224
  14. 224
  15. 192
  16. 260
  17. 56
  18. 320
  19. 128
  20. 212
  21. 104
  22. 140
  23. 112
  24. 120
  25. 284
  26. 128
  27. 152
  28. 192
  29. 184
  30. 312
  31. 168
  32. 136
  33. 232
  34. 204
  35. 80
  36. 156
  37. 104
  38. 296
  39. 300
  40. 148

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