計算:9÷13+13÷9+11÷13+14÷9+6÷13=______.

計算:9÷13+13÷9+11÷13+14÷9+6÷13=______.


9÷13+13÷9+11÷13+14÷9+6÷13,=913+139+1113+149+613,=(913+1113+613)+(139+149),=2+3,=5.故答案為:5.



5/14*9/11+13/14*11/5簡便運算


連括弧都沒加,怎麼算,13/14*11/5是(13/14)*(11/5),還是13/(14*11)/5?



6/11+11/30*10 6/13*3/8*4/9簡便計算


6/11+11/30*10
=6/11+11/3
=18/33+121/33
=139/33
6/13*3/8*4/9
=6/13x(3/8x4/9)
=6/13x1/6
=1/13