数学题,要过程,谢谢
5个回答
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5.
=-15.467-4.427+19.467
=-15.467+19.467-4.427
=4-4.427
=-0.427
6.
=-1/3-0.75-13/4
=-1/3-3/4-13/4
=-1/3-4
=-13/3(或4又3分之一)
7.
=-11/3+11/4+5/3-7/4
=-6/3+4/4
=-2+1
=-1
8.
=(3/2+17/3-7/2-29/3)-5
=(-4/2-12/3)-5
=-6-5
=-11
=-15.467-4.427+19.467
=-15.467+19.467-4.427
=4-4.427
=-0.427
6.
=-1/3-0.75-13/4
=-1/3-3/4-13/4
=-1/3-4
=-13/3(或4又3分之一)
7.
=-11/3+11/4+5/3-7/4
=-6/3+4/4
=-2+1
=-1
8.
=(3/2+17/3-7/2-29/3)-5
=(-4/2-12/3)-5
=-6-5
=-11
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