数学题求解答谢谢 20
2021-03-12 · 知道合伙人教育行家
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6/7+(3/5-2/7)
=6/7+11/35
=41/35
3/4-(1/2+1/4)
=3/4-1/2-1/4
=3/4-1/4-1/2
=1/2-1/2
=0
20/11-(20/11-2/5)
=20/11-20/11+2/5
=0+2/5
=2/5
=6/7+11/35
=41/35
3/4-(1/2+1/4)
=3/4-1/2-1/4
=3/4-1/4-1/2
=1/2-1/2
=0
20/11-(20/11-2/5)
=20/11-20/11+2/5
=0+2/5
=2/5
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