十万火急！！！用合适的方法计算下列分数数学题：过程要有，要正确确用分数化小数或小数化分数!

来源：百度知道 编辑：UC知道 时间：2024/06/18 09:31:23
9又4\15+(1.25-2\5) 4又2\3-2.5+3又1\6

3又9\14-(0.25+1又9\14)-1又3\4 4又1\3(2又4\5-0.08)

6又2\7-(3.25+1又5\6

(9+4/15)+(1.25-2/5)
=9+4/15+1.25-0.4
=9+4/15+0.85
=9+4/15+17/20
=9+16/60+51/60
=9+67/60
=10+7/60
=10又7/60

4又2\3-2.5+3又1\6
=4+2/3-2-1/2+3+1/6
=5+4/6-3/6+1/6
=5+2/6
=6+1/3
=6又1/3

3又9\14-(0.25+1又9\14)-1又3\4
=3+9/14-1/4-1-9/14-1-3/4
=1-1/4-3/4
=1-1
=0

4又1\3(2又4\5-0.08)
=(4+1/3)*(2+4/5-2/25)
=13/4*(2+18/25)
=13/4*68/25
=221/25
=8又21/55

6又2\7-(3.25+1又5\6)
=6+2/7-3-1/4-1-5/6
=2+24/84-21/84-70/84
=2-67/84
=1+17/84
=1又17/84