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Sagot :

Réponse:

  • 1

3/5 =3×7/5×7=21/35 3/4=3×15/4×15 = 45/70

80/100=80÷20/100÷20=40/50 49/21=49÷7/21÷7=7/3

  • 2

4/5=20/25 30/36 34/78

7=59/8 7/3 8/5

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