Explications étape par étape:
A=(4-2/3)(2-4/3)
=(12/3-2/3)(6/3-4/3)
=10/3×2/3
=20/9
B=3/4-1/4÷5/2
=3/4-1/4×2/5
=3/4-2/20
=15/20-2/20
=13/20
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Explications étape par étape:
A=(4-2/3)(2-4/3)
=(12/3-2/3)(6/3-4/3)
=10/3×2/3
=20/9
B=3/4-1/4÷5/2
=3/4-1/4×2/5
=3/4-2/20
=15/20-2/20
=13/20