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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 998 · 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. 1.29 × 4 =
  2. 2.14 × 8 =
  3. 3.38 × 8 =
  4. 4.52 × 4 =
  5. 5.41 × 4 =
  6. 6.40 × 4 =
  7. 7.71 × 4 =
  8. 8.18 × 8 =
  9. 9.37 × 8 =
  10. 10.24 × 8 =
  11. 11.30 × 4 =
  12. 12.28 × 4 =
  13. 13.20 × 8 =
  14. 14.31 × 8 =
  15. 15.36 × 8 =
  16. 16.73 × 4 =
  17. 17.66 × 4 =
  18. 18.28 × 8 =
  19. 19.17 × 8 =
  20. 20.34 × 8 =
  21. 21.12 × 4 =
  22. 22.25 × 4 =
  23. 23.53 × 4 =
  24. 24.32 × 8 =
  25. 25.54 × 4 =
  26. 26.16 × 8 =
  27. 27.42 × 4 =
  28. 28.19 × 4 =
  29. 29.26 × 8 =
  30. 30.25 × 8 =
  31. 31.68 × 4 =
  32. 32.21 × 8 =
  33. 33.33 × 8 =
  34. 34.75 × 4 =
  35. 35.21 × 4 =
  36. 36.23 × 8 =
  37. 37.17 × 4 =
  38. 38.12 × 8 =
  39. 39.39 × 8 =
  40. 40.69 × 4 =

Answer key

  1. 116
  2. 112
  3. 304
  4. 208
  5. 164
  6. 160
  7. 284
  8. 144
  9. 296
  10. 192
  11. 120
  12. 112
  13. 160
  14. 248
  15. 288
  16. 292
  17. 264
  18. 224
  19. 136
  20. 272
  21. 48
  22. 100
  23. 212
  24. 256
  25. 216
  26. 128
  27. 168
  28. 76
  29. 208
  30. 200
  31. 272
  32. 168
  33. 264
  34. 300
  35. 84
  36. 184
  37. 68
  38. 96
  39. 312
  40. 276

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