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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 477 · 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. 1.29 × 4 =
  2. 2.23 × 4 =
  3. 3.12 × 8 =
  4. 4.25 × 8 =
  5. 5.24 × 8 =
  6. 6.64 × 4 =
  7. 7.14 × 4 =
  8. 8.18 × 8 =
  9. 9.37 × 8 =
  10. 10.55 × 4 =
  11. 11.25 × 4 =
  12. 12.29 × 8 =
  13. 13.28 × 8 =
  14. 14.19 × 4 =
  15. 15.20 × 4 =
  16. 16.28 × 4 =
  17. 17.68 × 4 =
  18. 18.65 × 4 =
  19. 19.14 × 8 =
  20. 20.13 × 4 =
  21. 21.27 × 8 =
  22. 22.36 × 8 =
  23. 23.26 × 8 =
  24. 24.38 × 4 =
  25. 25.26 × 4 =
  26. 26.38 × 8 =
  27. 27.13 × 8 =
  28. 28.20 × 8 =
  29. 29.17 × 8 =
  30. 30.61 × 4 =
  31. 31.15 × 8 =
  32. 32.12 × 4 =
  33. 33.46 × 4 =
  34. 34.71 × 4 =
  35. 35.41 × 4 =
  36. 36.70 × 4 =
  37. 37.36 × 4 =
  38. 38.21 × 8 =
  39. 39.42 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 116
  2. 92
  3. 96
  4. 200
  5. 192
  6. 256
  7. 56
  8. 144
  9. 296
  10. 220
  11. 100
  12. 232
  13. 224
  14. 76
  15. 80
  16. 112
  17. 272
  18. 260
  19. 112
  20. 52
  21. 216
  22. 288
  23. 208
  24. 152
  25. 104
  26. 304
  27. 104
  28. 160
  29. 136
  30. 244
  31. 120
  32. 48
  33. 184
  34. 284
  35. 164
  36. 280
  37. 144
  38. 168
  39. 168
  40. 280

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