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问一下这两道题怎么写
1个回答
展开全部
168.8/(24.3*2-6.4)
=168.8/(48.6-6.4)
=168.8/42.2
=4
(7/20+11/50+6/25)/(2/5)
=(35/100+22/100+24/100)/(2/5)
=(81/100)/(2/5)
=81/40
=168.8/(48.6-6.4)
=168.8/42.2
=4
(7/20+11/50+6/25)/(2/5)
=(35/100+22/100+24/100)/(2/5)
=(81/100)/(2/5)
=81/40
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