简便计算,
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简便计算,简便计算, 简便计算,102+7.5*36/2.7=102+7.5*40/3=102+100=2021.6*(21/1.4)=1.6*30/2=0.8*30=240.2
简便计算,
简便计算,
简便计算,
102+7.5*36/2.7
=102+7.5*40/3
=102+100
=202
1.6*(21/1.4)
=1.6*30/2
=0.8*30
=24
0.25*3.2*12.5
=0.8*12.5
=10
3/4*(5/6-1/3+1/6)
=3/4*(1-1/3)
=3/4*2/3
=1/2
1.35-9/11+1.65-2/11
=1.35-(9/11+2/11)+1.65
=3-1
=2
4/9*7/10+5/9/(10/7)
=4/9*7/10+5/9*7/10
=7/10*(4/9+5/9)
=7/10 .
25%＝1/4，所以x=1/2