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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 877 · 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. 2.33 × 8 =
  3. 3.53 × 4 =
  4. 4.12 × 8 =
  5. 5.40 × 4 =
  6. 6.18 × 8 =
  7. 7.49 × 4 =
  8. 8.22 × 8 =
  9. 9.56 × 4 =
  10. 10.35 × 8 =
  11. 11.65 × 4 =
  12. 12.19 × 8 =
  13. 13.39 × 8 =
  14. 14.16 × 8 =
  15. 15.36 × 4 =
  16. 16.13 × 4 =
  17. 17.17 × 4 =
  18. 18.21 × 8 =
  19. 19.27 × 4 =
  20. 20.37 × 8 =
  21. 21.36 × 8 =
  22. 22.24 × 4 =
  23. 23.18 × 4 =
  24. 24.58 × 4 =
  25. 25.21 × 4 =
  26. 26.64 × 4 =
  27. 27.15 × 8 =
  28. 28.37 × 4 =
  29. 29.33 × 4 =
  30. 30.32 × 8 =
  31. 31.43 × 4 =
  32. 32.28 × 4 =
  33. 33.29 × 8 =
  34. 34.46 × 4 =
  35. 35.26 × 4 =
  36. 36.20 × 8 =
  37. 37.13 × 8 =
  38. 38.52 × 4 =
  39. 39.34 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 76
  2. 264
  3. 212
  4. 96
  5. 160
  6. 144
  7. 196
  8. 176
  9. 224
  10. 280
  11. 260
  12. 152
  13. 312
  14. 128
  15. 144
  16. 52
  17. 68
  18. 168
  19. 108
  20. 296
  21. 288
  22. 96
  23. 72
  24. 232
  25. 84
  26. 256
  27. 120
  28. 148
  29. 132
  30. 256
  31. 172
  32. 112
  33. 232
  34. 184
  35. 104
  36. 160
  37. 104
  38. 208
  39. 272
  40. 88

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