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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 132 · 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. 1.34 × 4 =
  2. 2.13 × 8 =
  3. 3.19 × 8 =
  4. 4.50 × 4 =
  5. 5.30 × 8 =
  6. 6.33 × 8 =
  7. 7.18 × 8 =
  8. 8.27 × 4 =
  9. 9.16 × 8 =
  10. 10.12 × 8 =
  11. 11.17 × 8 =
  12. 12.18 × 4 =
  13. 13.13 × 4 =
  14. 14.14 × 8 =
  15. 15.23 × 4 =
  16. 16.23 × 8 =
  17. 17.73 × 4 =
  18. 18.70 × 4 =
  19. 19.36 × 8 =
  20. 20.12 × 4 =
  21. 21.21 × 8 =
  22. 22.43 × 4 =
  23. 23.25 × 8 =
  24. 24.40 × 4 =
  25. 25.20 × 8 =
  26. 26.40 × 8 =
  27. 27.75 × 4 =
  28. 28.16 × 4 =
  29. 29.67 × 4 =
  30. 30.15 × 8 =
  31. 31.36 × 4 =
  32. 32.15 × 4 =
  33. 33.65 × 4 =
  34. 34.42 × 4 =
  35. 35.60 × 4 =
  36. 36.68 × 4 =
  37. 37.32 × 8 =
  38. 38.30 × 4 =
  39. 39.19 × 4 =
  40. 40.28 × 4 =

Answer key

  1. 136
  2. 104
  3. 152
  4. 200
  5. 240
  6. 264
  7. 144
  8. 108
  9. 128
  10. 96
  11. 136
  12. 72
  13. 52
  14. 112
  15. 92
  16. 184
  17. 292
  18. 280
  19. 288
  20. 48
  21. 168
  22. 172
  23. 200
  24. 160
  25. 160
  26. 320
  27. 300
  28. 64
  29. 268
  30. 120
  31. 144
  32. 60
  33. 260
  34. 168
  35. 240
  36. 272
  37. 256
  38. 120
  39. 76
  40. 112

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