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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 801 · 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. 1.26 × 4 =
  2. 2.21 × 8 =
  3. 3.20 × 8 =
  4. 4.25 × 4 =
  5. 5.31 × 8 =
  6. 6.17 × 8 =
  7. 7.39 × 8 =
  8. 8.35 × 8 =
  9. 9.29 × 4 =
  10. 10.19 × 4 =
  11. 11.45 × 4 =
  12. 12.15 × 8 =
  13. 13.18 × 4 =
  14. 14.31 × 4 =
  15. 15.59 × 4 =
  16. 16.12 × 4 =
  17. 17.16 × 8 =
  18. 18.56 × 4 =
  19. 19.71 × 4 =
  20. 20.38 × 4 =
  21. 21.36 × 8 =
  22. 22.72 × 4 =
  23. 23.24 × 4 =
  24. 24.24 × 8 =
  25. 25.21 × 4 =
  26. 26.62 × 4 =
  27. 27.13 × 8 =
  28. 28.46 × 4 =
  29. 29.49 × 4 =
  30. 30.61 × 4 =
  31. 31.34 × 4 =
  32. 32.54 × 4 =
  33. 33.32 × 8 =
  34. 34.43 × 4 =
  35. 35.40 × 4 =
  36. 36.15 × 4 =
  37. 37.33 × 8 =
  38. 38.60 × 4 =
  39. 39.26 × 8 =
  40. 40.27 × 8 =

Answer key

  1. 104
  2. 168
  3. 160
  4. 100
  5. 248
  6. 136
  7. 312
  8. 280
  9. 116
  10. 76
  11. 180
  12. 120
  13. 72
  14. 124
  15. 236
  16. 48
  17. 128
  18. 224
  19. 284
  20. 152
  21. 288
  22. 288
  23. 96
  24. 192
  25. 84
  26. 248
  27. 104
  28. 184
  29. 196
  30. 244
  31. 136
  32. 216
  33. 256
  34. 172
  35. 160
  36. 60
  37. 264
  38. 240
  39. 208
  40. 216

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