简算 29/45-(29/45-1/5) 1/4+5/6-(1/2-1/4) 11/21+3/7-11/21 2/9+5/9+7/9 1-5/12-7/12 5/6+7/10+3/10+1/6
2个回答
展开全部
29/45-(29/45-1/5)
29/45-29/45+1/5
=1/5
1/4+5/6-(1/2-1/4)
=1/4+1/4-1/2+5/6
=5/6
11/21+3/7-11/21
=11/21-11/21+3/7
=3/7
2/9+5/9+7/9
=7/9+7/9
=14/9
1-5/12-7/12
=1-(5/12+7/12)
=1-1
=0
5/6+7/10+3/10+1/6
=5/6+1/6+(7/10+3/10)
=1+1
=2
4/25+5/6+21/25+1/6
=4/25+21/25+(5/6+1/6)
=1+1
=2
29/45-29/45+1/5
=1/5
1/4+5/6-(1/2-1/4)
=1/4+1/4-1/2+5/6
=5/6
11/21+3/7-11/21
=11/21-11/21+3/7
=3/7
2/9+5/9+7/9
=7/9+7/9
=14/9
1-5/12-7/12
=1-(5/12+7/12)
=1-1
=0
5/6+7/10+3/10+1/6
=5/6+1/6+(7/10+3/10)
=1+1
=2
4/25+5/6+21/25+1/6
=4/25+21/25+(5/6+1/6)
=1+1
=2
2012-07-03
展开全部
29/45-(29/45-1/5)
29/45-29/45+1/5
=1/5
1/4+5/6-(1/2-1/4)
=1/4+1/4-1/2+5/6
=5/6
11/21+3/7-11/21
=11/21-11/21+3/7
=3/7
2/9+5/9+7/9
=7/9+7/9
=14/9
1-5/12-7/12
=1-(5/12+7/12)
=1-1
=0
5/6+7/10+3/10+1/6
=5/6+1/6+(7/10+3/10)
=1+1
=2
4/25+5/6+21/25+1/6
=4/25+21/25+(5/6+1/6)
=1+1
=2
29/45-29/45+1/5
=1/5
1/4+5/6-(1/2-1/4)
=1/4+1/4-1/2+5/6
=5/6
11/21+3/7-11/21
=11/21-11/21+3/7
=3/7
2/9+5/9+7/9
=7/9+7/9
=14/9
1-5/12-7/12
=1-(5/12+7/12)
=1-1
=0
5/6+7/10+3/10+1/6
=5/6+1/6+(7/10+3/10)
=1+1
=2
4/25+5/6+21/25+1/6
=4/25+21/25+(5/6+1/6)
=1+1
=2
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