炒河粉宝宝
幼苗
共回答了19个问题采纳率:89.5% 举报
1:14.75-(7又11分之1-4.25)
=14.75-7又11分之1+4.25
=14.75+4.25-7又11分之1
=19-7-1/11
=11+1-1/11
=11+10/11
=11又11分之10
2:5又3分之1-2.75+4又3分之2-2又4分之1
=[(5+1/3)+(4+2/3)]-(2.75+2+1/4)
=10-5
=5
3:2.5+3又20分之3-0.785
=2.5+3.15-0.785
=4.865
4:0.28/{0.028*(0.1-0.05)}-194又5分之1
=0.28/(0.028*0.05)-194又5分之1
=(0.28/0.028)/0.05-194又5分之1
=10*20-194又5分之1
=200-194又5分之1
=5又5分之4
1年前
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