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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 771 · 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. 1.13 × 8 =
  2. 2.29 × 4 =
  3. 3.21 × 4 =
  4. 4.12 × 8 =
  5. 5.24 × 4 =
  6. 6.25 × 4 =
  7. 7.69 × 4 =
  8. 8.51 × 4 =
  9. 9.22 × 8 =
  10. 10.37 × 8 =
  11. 11.28 × 4 =
  12. 12.24 × 8 =
  13. 13.34 × 4 =
  14. 14.55 × 4 =
  15. 15.68 × 4 =
  16. 16.26 × 4 =
  17. 17.71 × 4 =
  18. 18.28 × 8 =
  19. 19.34 × 8 =
  20. 20.17 × 8 =
  21. 21.18 × 8 =
  22. 22.21 × 8 =
  23. 23.35 × 8 =
  24. 24.43 × 4 =
  25. 25.16 × 8 =
  26. 26.38 × 8 =
  27. 27.29 × 8 =
  28. 28.40 × 8 =
  29. 29.27 × 8 =
  30. 30.14 × 8 =
  31. 31.67 × 4 =
  32. 32.23 × 8 =
  33. 33.37 × 4 =
  34. 34.25 × 8 =
  35. 35.70 × 4 =
  36. 36.39 × 8 =
  37. 37.12 × 4 =
  38. 38.18 × 4 =
  39. 39.23 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 104
  2. 116
  3. 84
  4. 96
  5. 96
  6. 100
  7. 276
  8. 204
  9. 176
  10. 296
  11. 112
  12. 192
  13. 136
  14. 220
  15. 272
  16. 104
  17. 284
  18. 224
  19. 272
  20. 136
  21. 144
  22. 168
  23. 280
  24. 172
  25. 128
  26. 304
  27. 232
  28. 320
  29. 216
  30. 112
  31. 268
  32. 184
  33. 148
  34. 200
  35. 280
  36. 312
  37. 48
  38. 72
  39. 92
  40. 256

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