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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 534 · 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. 1.68 × 4 =
  2. 2.75 × 4 =
  3. 3.73 × 4 =
  4. 4.27 × 8 =
  5. 5.30 × 8 =
  6. 6.15 × 8 =
  7. 7.24 × 4 =
  8. 8.28 × 8 =
  9. 9.53 × 4 =
  10. 10.35 × 4 =
  11. 11.21 × 8 =
  12. 12.40 × 8 =
  13. 13.23 × 8 =
  14. 14.29 × 8 =
  15. 15.34 × 4 =
  16. 16.39 × 8 =
  17. 17.36 × 8 =
  18. 18.27 × 4 =
  19. 19.30 × 4 =
  20. 20.41 × 4 =
  21. 21.20 × 8 =
  22. 22.13 × 8 =
  23. 23.58 × 4 =
  24. 24.26 × 8 =
  25. 25.69 × 4 =
  26. 26.16 × 8 =
  27. 27.12 × 4 =
  28. 28.70 × 4 =
  29. 29.65 × 4 =
  30. 30.64 × 4 =
  31. 31.25 × 4 =
  32. 32.18 × 4 =
  33. 33.23 × 4 =
  34. 34.50 × 4 =
  35. 35.43 × 4 =
  36. 36.14 × 8 =
  37. 37.56 × 4 =
  38. 38.33 × 4 =
  39. 39.33 × 8 =
  40. 40.18 × 8 =

Answer key

  1. 272
  2. 300
  3. 292
  4. 216
  5. 240
  6. 120
  7. 96
  8. 224
  9. 212
  10. 140
  11. 168
  12. 320
  13. 184
  14. 232
  15. 136
  16. 312
  17. 288
  18. 108
  19. 120
  20. 164
  21. 160
  22. 104
  23. 232
  24. 208
  25. 276
  26. 128
  27. 48
  28. 280
  29. 260
  30. 256
  31. 100
  32. 72
  33. 92
  34. 200
  35. 172
  36. 112
  37. 224
  38. 132
  39. 264
  40. 144

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