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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 805 · 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. 1.44 × 4 =
  2. 2.62 × 4 =
  3. 3.64 × 4 =
  4. 4.18 × 4 =
  5. 5.24 × 4 =
  6. 6.42 × 4 =
  7. 7.36 × 8 =
  8. 8.23 × 8 =
  9. 9.17 × 8 =
  10. 10.28 × 8 =
  11. 11.38 × 8 =
  12. 12.22 × 8 =
  13. 13.72 × 4 =
  14. 14.26 × 4 =
  15. 15.38 × 4 =
  16. 16.16 × 8 =
  17. 17.16 × 4 =
  18. 18.50 × 4 =
  19. 19.69 × 4 =
  20. 20.29 × 4 =
  21. 21.30 × 4 =
  22. 22.36 × 4 =
  23. 23.18 × 8 =
  24. 24.27 × 8 =
  25. 25.34 × 4 =
  26. 26.13 × 4 =
  27. 27.15 × 8 =
  28. 28.14 × 8 =
  29. 29.28 × 4 =
  30. 30.51 × 4 =
  31. 31.75 × 4 =
  32. 32.37 × 4 =
  33. 33.48 × 4 =
  34. 34.32 × 8 =
  35. 35.39 × 8 =
  36. 36.53 × 4 =
  37. 37.37 × 8 =
  38. 38.33 × 8 =
  39. 39.58 × 4 =
  40. 40.55 × 4 =

Answer key

  1. 176
  2. 248
  3. 256
  4. 72
  5. 96
  6. 168
  7. 288
  8. 184
  9. 136
  10. 224
  11. 304
  12. 176
  13. 288
  14. 104
  15. 152
  16. 128
  17. 64
  18. 200
  19. 276
  20. 116
  21. 120
  22. 144
  23. 144
  24. 216
  25. 136
  26. 52
  27. 120
  28. 112
  29. 112
  30. 204
  31. 300
  32. 148
  33. 192
  34. 256
  35. 312
  36. 212
  37. 296
  38. 264
  39. 232
  40. 220

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