Toán Lớp 7: Tính
(-2/3 + 3/7) : 4/5 + (-1/3 + 4/7) : 4/5
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Toán Lớp 7: Tính
(-2/3 + 3/7) : 4/5 + (-1/3 + 4/7) : 4/5
Comments ( 2 )
=(-2/3+3/7)*5/4+(-1/3+4/7)*5/4
=5/4*(-2/3+3/7-1/3+4/7)
=5/4*(-1/3-2/3+3/7+4/7)
=5/4*(-1+1)
=5/4*0
=0