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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 492 · 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. 1.23 × 4 =
  2. 2.12 × 8 =
  3. 3.28 × 8 =
  4. 4.35 × 8 =
  5. 5.73 × 4 =
  6. 6.24 × 8 =
  7. 7.29 × 4 =
  8. 8.26 × 8 =
  9. 9.18 × 4 =
  10. 10.54 × 4 =
  11. 11.16 × 8 =
  12. 12.21 × 8 =
  13. 13.33 × 8 =
  14. 14.40 × 8 =
  15. 15.32 × 4 =
  16. 16.31 × 4 =
  17. 17.31 × 8 =
  18. 18.64 × 4 =
  19. 19.14 × 8 =
  20. 20.70 × 4 =
  21. 21.17 × 8 =
  22. 22.23 × 8 =
  23. 23.65 × 4 =
  24. 24.32 × 8 =
  25. 25.40 × 4 =
  26. 26.71 × 4 =
  27. 27.36 × 8 =
  28. 28.51 × 4 =
  29. 29.36 × 4 =
  30. 30.75 × 4 =
  31. 31.19 × 4 =
  32. 32.16 × 4 =
  33. 33.24 × 4 =
  34. 34.61 × 4 =
  35. 35.17 × 4 =
  36. 36.26 × 4 =
  37. 37.18 × 8 =
  38. 38.52 × 4 =
  39. 39.28 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 92
  2. 96
  3. 224
  4. 280
  5. 292
  6. 192
  7. 116
  8. 208
  9. 72
  10. 216
  11. 128
  12. 168
  13. 264
  14. 320
  15. 128
  16. 124
  17. 248
  18. 256
  19. 112
  20. 280
  21. 136
  22. 184
  23. 260
  24. 256
  25. 160
  26. 284
  27. 288
  28. 204
  29. 144
  30. 300
  31. 76
  32. 64
  33. 96
  34. 244
  35. 68
  36. 104
  37. 144
  38. 208
  39. 112
  40. 232

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