递等式计算:2/3+1/4-5/6,5/6+7/15-7/9,2+7/8-(3/5-0.4)

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 06:47:23
递等式计算:2/3+1/4-5/6,5/6+7/15-7/9,2+7/8-(3/5-0.4)递等式计算:2/3+1/4-5/6,5/6+7/15-7/9,2+7/8-(3/5-0.4)递等式计算:2/

递等式计算:2/3+1/4-5/6,5/6+7/15-7/9,2+7/8-(3/5-0.4)
递等式计算:2/3+1/4-5/6,5/6+7/15-7/9,2+7/8-(3/5-0.4)

递等式计算:2/3+1/4-5/6,5/6+7/15-7/9,2+7/8-(3/5-0.4)
2/3+1/4-5/6
=8/12+3/12-10/12
=1/12
5/6+7/15-7/9
=75/90+42/90-70/90
=47/90
2+7/8-(3/5-0.4)
=2+7/8-3/5+2/5
=2+7/8-1/5
=2+35/40-8/40
=2又27/40