简便计算 0.75+(2又3/4)+(+0.125)+(-12又5/7)+(-4又1/8)0.75+(2又3/4)+(+0.125)+(-12又5/7)+(-4又1/8)

问题描述:

简便计算 0.75+(2又3/4)+(+0.125)+(-12又5/7)+(-4又1/8)
0.75+(2又3/4)+(+0.125)+(-12又5/7)+(-4又1/8)

原式
=3/4+2+3/4+1/8-12-5/7-4-1/8
=3/2-14-5/7
=11/14-14
=-13又-3/14

0.75+(2又3/4)+(+0.125)+(-12又5/7)+(-4又1/8)
=(1/4+2又3/4)-(4又1/8-1/8)-12又5/7
=3-4-12又5/7
=-13又5/7

=3/4+2+3/4+1/8-12-5/7-4-1/8
=3+6/4-12-4-5/7
=2/4-5/7-12
=14/28-20/28-12
=-3/14-12
=-12又14分之3
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