3/4一（1/5十1/3）x98，（1/2十1/4_1/6）X12，10x1/2+1/2x2，7/
答案:1 悬赏:80
解决时间 2021-02-26 11:32
- 提问者网友：半生酒醒
- 2021-02-26 05:07
3/4一（1/5十1/3）x98，（1/2十1/4_1/6）X12，10x1/2+1/2x2，7/
最佳答案
- 二级知识专家网友：拾荒鲤
- 2021-02-26 05:16
3/4一（1/5十1/3）x9/8
=3/4-8/15×9/8
=3/4-3/5
=3/20
（1/2十1/4-1/6）X12
=1/2×12+1/4×12-1/6×12
=6+3-2
=7
10x1/2+1/2x2
=5+1
=6
7/10十（4/7+1/2）x7/25
=7/10+4/7×7/25+1/2×7/25
=7/10+4/25+7/50
=1
（9/16+9/8）÷3/8
=9/16÷3/8+9/8÷3/8
=3/2+3
=4.5
=3/4-8/15×9/8
=3/4-3/5
=3/20
（1/2十1/4-1/6）X12
=1/2×12+1/4×12-1/6×12
=6+3-2
=7
10x1/2+1/2x2
=5+1
=6
7/10十（4/7+1/2）x7/25
=7/10+4/7×7/25+1/2×7/25
=7/10+4/25+7/50
=1
（9/16+9/8）÷3/8
=9/16÷3/8+9/8÷3/8
=3/2+3
=4.5
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