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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 441 · 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. 1.33 × 8 =
  2. 2.23 × 8 =
  3. 3.19 × 8 =
  4. 4.21 × 4 =
  5. 5.39 × 8 =
  6. 6.52 × 4 =
  7. 7.21 × 8 =
  8. 8.34 × 8 =
  9. 9.20 × 8 =
  10. 10.18 × 8 =
  11. 11.63 × 4 =
  12. 12.61 × 4 =
  13. 13.57 × 4 =
  14. 14.22 × 8 =
  15. 15.28 × 8 =
  16. 16.20 × 4 =
  17. 17.42 × 4 =
  18. 18.31 × 8 =
  19. 19.26 × 8 =
  20. 20.71 × 4 =
  21. 21.13 × 4 =
  22. 22.58 × 4 =
  23. 23.64 × 4 =
  24. 24.43 × 4 =
  25. 25.72 × 4 =
  26. 26.35 × 8 =
  27. 27.66 × 4 =
  28. 28.26 × 4 =
  29. 29.16 × 8 =
  30. 30.25 × 4 =
  31. 31.37 × 4 =
  32. 32.49 × 4 =
  33. 33.35 × 4 =
  34. 34.22 × 4 =
  35. 35.40 × 8 =
  36. 36.31 × 4 =
  37. 37.12 × 8 =
  38. 38.36 × 8 =
  39. 39.38 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 264
  2. 184
  3. 152
  4. 84
  5. 312
  6. 208
  7. 168
  8. 272
  9. 160
  10. 144
  11. 252
  12. 244
  13. 228
  14. 176
  15. 224
  16. 80
  17. 168
  18. 248
  19. 208
  20. 284
  21. 52
  22. 232
  23. 256
  24. 172
  25. 288
  26. 280
  27. 264
  28. 104
  29. 128
  30. 100
  31. 148
  32. 196
  33. 140
  34. 88
  35. 320
  36. 124
  37. 96
  38. 288
  39. 152
  40. 200

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