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7/11÷9+1/4x7/11要简便运算.方程X十1/3X=4/5X一Xx5/6=1/9x9/1最后一道是1/9x9/11

题目详情
7/11÷9+1/4x7/11要简便运算.方程X十1/3X=4/5 X一Xx5/6=1/9x9/1
最后一道是1/9x9/11
▼优质解答
答案和解析
7/11÷9+1/4×7/11
=7/11×1/9+1/4×7/11 (除以一个数,等于乘以其倒数)
=7/11×(1/9+1/4) (提取公因数)
=7/11×13/36
=91/396
X十1/3X=4/5
4/3x=4/5
x=3/5
X一Xx5/6=1/9x9/11
x/6=1/11
x=6/11