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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 692 · 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. 1.69 × 4 =
  2. 2.67 × 4 =
  3. 3.40 × 4 =
  4. 4.38 × 4 =
  5. 5.16 × 4 =
  6. 6.56 × 4 =
  7. 7.17 × 8 =
  8. 8.36 × 8 =
  9. 9.35 × 4 =
  10. 10.23 × 8 =
  11. 11.36 × 4 =
  12. 12.18 × 8 =
  13. 13.42 × 4 =
  14. 14.21 × 8 =
  15. 15.13 × 4 =
  16. 16.24 × 8 =
  17. 17.39 × 8 =
  18. 18.41 × 4 =
  19. 19.23 × 4 =
  20. 20.50 × 4 =
  21. 21.57 × 4 =
  22. 22.25 × 8 =
  23. 23.20 × 8 =
  24. 24.40 × 8 =
  25. 25.70 × 4 =
  26. 26.51 × 4 =
  27. 27.31 × 4 =
  28. 28.29 × 8 =
  29. 29.19 × 8 =
  30. 30.28 × 8 =
  31. 31.31 × 8 =
  32. 32.63 × 4 =
  33. 33.72 × 4 =
  34. 34.12 × 8 =
  35. 35.34 × 8 =
  36. 36.45 × 4 =
  37. 37.43 × 4 =
  38. 38.18 × 4 =
  39. 39.27 × 4 =
  40. 40.38 × 8 =

Answer key

  1. 276
  2. 268
  3. 160
  4. 152
  5. 64
  6. 224
  7. 136
  8. 288
  9. 140
  10. 184
  11. 144
  12. 144
  13. 168
  14. 168
  15. 52
  16. 192
  17. 312
  18. 164
  19. 92
  20. 200
  21. 228
  22. 200
  23. 160
  24. 320
  25. 280
  26. 204
  27. 124
  28. 232
  29. 152
  30. 224
  31. 248
  32. 252
  33. 288
  34. 96
  35. 272
  36. 180
  37. 172
  38. 72
  39. 108
  40. 304

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