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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 529 · 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. 1.35 × 8 =
  2. 2.18 × 8 =
  3. 3.26 × 8 =
  4. 4.23 × 8 =
  5. 5.21 × 8 =
  6. 6.37 × 4 =
  7. 7.13 × 4 =
  8. 8.53 × 4 =
  9. 9.48 × 4 =
  10. 10.28 × 8 =
  11. 11.67 × 4 =
  12. 12.40 × 8 =
  13. 13.36 × 8 =
  14. 14.17 × 8 =
  15. 15.14 × 8 =
  16. 16.62 × 4 =
  17. 17.31 × 4 =
  18. 18.12 × 4 =
  19. 19.38 × 8 =
  20. 20.24 × 4 =
  21. 21.52 × 4 =
  22. 22.72 × 4 =
  23. 23.68 × 4 =
  24. 24.27 × 8 =
  25. 25.56 × 4 =
  26. 26.24 × 8 =
  27. 27.69 × 4 =
  28. 28.21 × 4 =
  29. 29.37 × 8 =
  30. 30.26 × 4 =
  31. 31.33 × 8 =
  32. 32.15 × 4 =
  33. 33.60 × 4 =
  34. 34.73 × 4 =
  35. 35.30 × 8 =
  36. 36.16 × 4 =
  37. 37.32 × 8 =
  38. 38.71 × 4 =
  39. 39.46 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 280
  2. 144
  3. 208
  4. 184
  5. 168
  6. 148
  7. 52
  8. 212
  9. 192
  10. 224
  11. 268
  12. 320
  13. 288
  14. 136
  15. 112
  16. 248
  17. 124
  18. 48
  19. 304
  20. 96
  21. 208
  22. 288
  23. 272
  24. 216
  25. 224
  26. 192
  27. 276
  28. 84
  29. 296
  30. 104
  31. 264
  32. 60
  33. 240
  34. 292
  35. 240
  36. 64
  37. 256
  38. 284
  39. 184
  40. 108

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