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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 861 · 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. 1.19 × 4 =
  2. 2.14 × 8 =
  3. 3.33 × 8 =
  4. 4.51 × 4 =
  5. 5.70 × 4 =
  6. 6.31 × 8 =
  7. 7.34 × 4 =
  8. 8.55 × 4 =
  9. 9.45 × 4 =
  10. 10.50 × 4 =
  11. 11.14 × 4 =
  12. 12.56 × 4 =
  13. 13.22 × 8 =
  14. 14.29 × 8 =
  15. 15.57 × 4 =
  16. 16.75 × 4 =
  17. 17.13 × 8 =
  18. 18.20 × 8 =
  19. 19.29 × 4 =
  20. 20.15 × 8 =
  21. 21.36 × 8 =
  22. 22.26 × 8 =
  23. 23.16 × 8 =
  24. 24.62 × 4 =
  25. 25.21 × 8 =
  26. 26.27 × 4 =
  27. 27.69 × 4 =
  28. 28.21 × 4 =
  29. 29.12 × 8 =
  30. 30.46 × 4 =
  31. 31.47 × 4 =
  32. 32.19 × 8 =
  33. 33.54 × 4 =
  34. 34.18 × 8 =
  35. 35.44 × 4 =
  36. 36.28 × 8 =
  37. 37.40 × 4 =
  38. 38.25 × 8 =
  39. 39.40 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 76
  2. 112
  3. 264
  4. 204
  5. 280
  6. 248
  7. 136
  8. 220
  9. 180
  10. 200
  11. 56
  12. 224
  13. 176
  14. 232
  15. 228
  16. 300
  17. 104
  18. 160
  19. 116
  20. 120
  21. 288
  22. 208
  23. 128
  24. 248
  25. 168
  26. 108
  27. 276
  28. 84
  29. 96
  30. 184
  31. 188
  32. 152
  33. 216
  34. 144
  35. 176
  36. 224
  37. 160
  38. 200
  39. 320
  40. 152

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