8/9+10/11-(3/11+2/9)= 简便运算:9/26+5/14-3/13+3/28= 5/3+6/5-(2/3+1/5)= 方程解:15/16X+1/2=15/16+2/

问题描述:

8/9+10/11-(3/11+2/9)= 简便运算:9/26+5/14-3/13+3/28= 5/3+6/5-(2/3+1/5)= 方程解:15/16X+1/2=15/16+2/
快!

8/9+10/11-(3/11+2/9)= 8/9-2/9+10/11-3/11=2/3+7/11=43/339/26+5/14-3/13+3/28=9/26-3/13+5/14+3/28=3/26+13/28=211/364 5/3+6/5-(2/3+1/5)=5/3-2/3+6/5-1/5=1+1=2