计算. (1)5.2-(-3/4)+(+5/6)-(-7/12) (2)+3又8/11的绝对值-负27/10的绝对值-19/11的绝对值+负9/5的
问题描述:
计算. (1)5.2-(-3/4)+(+5/6)-(-7/12) (2)+3又8/11的绝对值-负27/10的绝对值-19/11的绝对值+负9/5的
答
5.2-(-3/4)+(+5/6)-(-7/12)
=26/5+3/4+5/6+7/12
=312/60+45/60+50/60+35/60
=221/30
|+3又8/11|-|-27/10|-|19/11|+|-9/5|
=41/11-27/10-19/11+9/5
=(41/11-19/11)+(9/5-27/10)
=2+(18/10-27/10)
=2+(-9/10)
=2-9/10
=11/10