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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 603 · 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. 1.63 × 4 =
  2. 2.32 × 8 =
  3. 3.26 × 8 =
  4. 4.19 × 8 =
  5. 5.30 × 8 =
  6. 6.24 × 4 =
  7. 7.34 × 4 =
  8. 8.24 × 8 =
  9. 9.31 × 4 =
  10. 10.16 × 4 =
  11. 11.51 × 4 =
  12. 12.47 × 4 =
  13. 13.25 × 8 =
  14. 14.49 × 4 =
  15. 15.40 × 4 =
  16. 16.19 × 4 =
  17. 17.40 × 8 =
  18. 18.16 × 8 =
  19. 19.37 × 4 =
  20. 20.29 × 8 =
  21. 21.27 × 8 =
  22. 22.21 × 4 =
  23. 23.70 × 4 =
  24. 24.18 × 8 =
  25. 25.38 × 8 =
  26. 26.25 × 4 =
  27. 27.23 × 8 =
  28. 28.14 × 8 =
  29. 29.15 × 8 =
  30. 30.46 × 4 =
  31. 31.42 × 4 =
  32. 32.17 × 4 =
  33. 33.66 × 4 =
  34. 34.36 × 8 =
  35. 35.31 × 8 =
  36. 36.28 × 4 =
  37. 37.17 × 8 =
  38. 38.45 × 4 =
  39. 39.56 × 4 =
  40. 40.18 × 4 =

Answer key

  1. 252
  2. 256
  3. 208
  4. 152
  5. 240
  6. 96
  7. 136
  8. 192
  9. 124
  10. 64
  11. 204
  12. 188
  13. 200
  14. 196
  15. 160
  16. 76
  17. 320
  18. 128
  19. 148
  20. 232
  21. 216
  22. 84
  23. 280
  24. 144
  25. 304
  26. 100
  27. 184
  28. 112
  29. 120
  30. 184
  31. 168
  32. 68
  33. 264
  34. 288
  35. 248
  36. 112
  37. 136
  38. 180
  39. 224
  40. 72

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