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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 693 · 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. 1.18 × 8 =
  2. 2.16 × 8 =
  3. 3.50 × 4 =
  4. 4.62 × 4 =
  5. 5.37 × 4 =
  6. 6.25 × 8 =
  7. 7.22 × 4 =
  8. 8.27 × 4 =
  9. 9.38 × 4 =
  10. 10.12 × 8 =
  11. 11.40 × 4 =
  12. 12.33 × 4 =
  13. 13.19 × 8 =
  14. 14.61 × 4 =
  15. 15.42 × 4 =
  16. 16.33 × 8 =
  17. 17.24 × 4 =
  18. 18.23 × 8 =
  19. 19.29 × 4 =
  20. 20.35 × 8 =
  21. 21.53 × 4 =
  22. 22.34 × 8 =
  23. 23.27 × 8 =
  24. 24.36 × 8 =
  25. 25.14 × 4 =
  26. 26.17 × 8 =
  27. 27.14 × 8 =
  28. 28.56 × 4 =
  29. 29.39 × 8 =
  30. 30.45 × 4 =
  31. 31.55 × 4 =
  32. 32.26 × 4 =
  33. 33.32 × 4 =
  34. 34.65 × 4 =
  35. 35.58 × 4 =
  36. 36.15 × 4 =
  37. 37.29 × 8 =
  38. 38.60 × 4 =
  39. 39.15 × 8 =
  40. 40.24 × 8 =

Answer key

  1. 144
  2. 128
  3. 200
  4. 248
  5. 148
  6. 200
  7. 88
  8. 108
  9. 152
  10. 96
  11. 160
  12. 132
  13. 152
  14. 244
  15. 168
  16. 264
  17. 96
  18. 184
  19. 116
  20. 280
  21. 212
  22. 272
  23. 216
  24. 288
  25. 56
  26. 136
  27. 112
  28. 224
  29. 312
  30. 180
  31. 220
  32. 104
  33. 128
  34. 260
  35. 232
  36. 60
  37. 232
  38. 240
  39. 120
  40. 192

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