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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 568 · 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. 1.18 × 8 =
  2. 2.31 × 8 =
  3. 3.56 × 4 =
  4. 4.50 × 4 =
  5. 5.29 × 4 =
  6. 6.52 × 4 =
  7. 7.31 × 4 =
  8. 8.23 × 8 =
  9. 9.18 × 4 =
  10. 10.37 × 8 =
  11. 11.19 × 4 =
  12. 12.36 × 8 =
  13. 13.34 × 8 =
  14. 14.20 × 8 =
  15. 15.28 × 8 =
  16. 16.30 × 8 =
  17. 17.21 × 8 =
  18. 18.13 × 4 =
  19. 19.32 × 8 =
  20. 20.71 × 4 =
  21. 21.70 × 4 =
  22. 22.16 × 8 =
  23. 23.24 × 8 =
  24. 24.67 × 4 =
  25. 25.22 × 8 =
  26. 26.38 × 8 =
  27. 27.29 × 8 =
  28. 28.25 × 4 =
  29. 29.14 × 4 =
  30. 30.42 × 4 =
  31. 31.46 × 4 =
  32. 32.15 × 4 =
  33. 33.27 × 8 =
  34. 34.34 × 4 =
  35. 35.17 × 8 =
  36. 36.58 × 4 =
  37. 37.27 × 4 =
  38. 38.75 × 4 =
  39. 39.63 × 4 =
  40. 40.20 × 4 =

Answer key

  1. 144
  2. 248
  3. 224
  4. 200
  5. 116
  6. 208
  7. 124
  8. 184
  9. 72
  10. 296
  11. 76
  12. 288
  13. 272
  14. 160
  15. 224
  16. 240
  17. 168
  18. 52
  19. 256
  20. 284
  21. 280
  22. 128
  23. 192
  24. 268
  25. 176
  26. 304
  27. 232
  28. 100
  29. 56
  30. 168
  31. 184
  32. 60
  33. 216
  34. 136
  35. 136
  36. 232
  37. 108
  38. 300
  39. 252
  40. 80

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