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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 390 · 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. 1.48 × 4 =
  2. 2.33 × 8 =
  3. 3.26 × 4 =
  4. 4.45 × 4 =
  5. 5.26 × 8 =
  6. 6.15 × 4 =
  7. 7.60 × 4 =
  8. 8.23 × 8 =
  9. 9.19 × 4 =
  10. 10.20 × 4 =
  11. 11.42 × 4 =
  12. 12.68 × 4 =
  13. 13.37 × 4 =
  14. 14.36 × 8 =
  15. 15.33 × 4 =
  16. 16.46 × 4 =
  17. 17.75 × 4 =
  18. 18.24 × 4 =
  19. 19.39 × 4 =
  20. 20.55 × 4 =
  21. 21.27 × 8 =
  22. 22.20 × 8 =
  23. 23.43 × 4 =
  24. 24.28 × 4 =
  25. 25.16 × 4 =
  26. 26.41 × 4 =
  27. 27.38 × 8 =
  28. 28.14 × 8 =
  29. 29.31 × 8 =
  30. 30.25 × 8 =
  31. 31.16 × 8 =
  32. 32.12 × 8 =
  33. 33.28 × 8 =
  34. 34.17 × 8 =
  35. 35.21 × 8 =
  36. 36.54 × 4 =
  37. 37.32 × 8 =
  38. 38.53 × 4 =
  39. 39.58 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 192
  2. 264
  3. 104
  4. 180
  5. 208
  6. 60
  7. 240
  8. 184
  9. 76
  10. 80
  11. 168
  12. 272
  13. 148
  14. 288
  15. 132
  16. 184
  17. 300
  18. 96
  19. 156
  20. 220
  21. 216
  22. 160
  23. 172
  24. 112
  25. 64
  26. 164
  27. 304
  28. 112
  29. 248
  30. 200
  31. 128
  32. 96
  33. 224
  34. 136
  35. 168
  36. 216
  37. 256
  38. 212
  39. 232
  40. 200

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