简便低等式:15分之8+12分之5-15分之3-12分之1
问题描述:
简便低等式:15分之8+12分之5-15分之3-12分之1
答
15分之8+12分之5-15分之3-12分之1
=8/15+5/12-3/15-1/12
=(8/15-3/15)-(5/12+1/12)
=5/15-6/12
=1/3-1/2
=2/6-3/6
=-1/6
答
结果么?三分之二
答
8/15+5/12-3/15-1/12
= (8/15-3/15)+(5/12-1/12)
= 5/15+4/12
= 1/3+1/3
= 2/3
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答
8/15+5/12-3/15-1/12
= 32/60+25/60-12/60-5/60
= 40/60
=2/3