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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 943 · 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. 2.32 × 4 =
  3. 3.15 × 8 =
  4. 4.40 × 8 =
  5. 5.19 × 4 =
  6. 6.29 × 4 =
  7. 7.32 × 8 =
  8. 8.18 × 8 =
  9. 9.25 × 8 =
  10. 10.14 × 8 =
  11. 11.19 × 8 =
  12. 12.23 × 8 =
  13. 13.33 × 4 =
  14. 14.38 × 8 =
  15. 15.31 × 8 =
  16. 16.53 × 4 =
  17. 17.20 × 4 =
  18. 18.20 × 8 =
  19. 19.47 × 4 =
  20. 20.30 × 8 =
  21. 21.16 × 8 =
  22. 22.18 × 4 =
  23. 23.35 × 8 =
  24. 24.49 × 4 =
  25. 25.24 × 4 =
  26. 26.24 × 8 =
  27. 27.42 × 4 =
  28. 28.67 × 4 =
  29. 29.59 × 4 =
  30. 30.30 × 4 =
  31. 31.64 × 4 =
  32. 32.41 × 4 =
  33. 33.58 × 4 =
  34. 34.36 × 8 =
  35. 35.39 × 8 =
  36. 36.46 × 4 =
  37. 37.14 × 4 =
  38. 38.60 × 4 =
  39. 39.31 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 264
  2. 128
  3. 120
  4. 320
  5. 76
  6. 116
  7. 256
  8. 144
  9. 200
  10. 112
  11. 152
  12. 184
  13. 132
  14. 304
  15. 248
  16. 212
  17. 80
  18. 160
  19. 188
  20. 240
  21. 128
  22. 72
  23. 280
  24. 196
  25. 96
  26. 192
  27. 168
  28. 268
  29. 236
  30. 120
  31. 256
  32. 164
  33. 232
  34. 288
  35. 312
  36. 184
  37. 56
  38. 240
  39. 124
  40. 292

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