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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 473 · 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. 1.24 × 8 =
  2. 2.45 × 4 =
  3. 3.32 × 8 =
  4. 4.15 × 8 =
  5. 5.30 × 8 =
  6. 6.37 × 8 =
  7. 7.23 × 8 =
  8. 8.40 × 8 =
  9. 9.12 × 4 =
  10. 10.38 × 8 =
  11. 11.17 × 4 =
  12. 12.33 × 8 =
  13. 13.35 × 8 =
  14. 14.16 × 8 =
  15. 15.35 × 4 =
  16. 16.39 × 8 =
  17. 17.30 × 4 =
  18. 18.43 × 4 =
  19. 19.55 × 4 =
  20. 20.21 × 4 =
  21. 21.65 × 4 =
  22. 22.13 × 8 =
  23. 23.20 × 4 =
  24. 24.75 × 4 =
  25. 25.14 × 4 =
  26. 26.56 × 4 =
  27. 27.61 × 4 =
  28. 28.51 × 4 =
  29. 29.27 × 4 =
  30. 30.34 × 4 =
  31. 31.54 × 4 =
  32. 32.16 × 4 =
  33. 33.19 × 8 =
  34. 34.34 × 8 =
  35. 35.25 × 4 =
  36. 36.38 × 4 =
  37. 37.36 × 8 =
  38. 38.31 × 8 =
  39. 39.44 × 4 =
  40. 40.70 × 4 =

Answer key

  1. 192
  2. 180
  3. 256
  4. 120
  5. 240
  6. 296
  7. 184
  8. 320
  9. 48
  10. 304
  11. 68
  12. 264
  13. 280
  14. 128
  15. 140
  16. 312
  17. 120
  18. 172
  19. 220
  20. 84
  21. 260
  22. 104
  23. 80
  24. 300
  25. 56
  26. 224
  27. 244
  28. 204
  29. 108
  30. 136
  31. 216
  32. 64
  33. 152
  34. 272
  35. 100
  36. 152
  37. 288
  38. 248
  39. 176
  40. 280

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