Question

17．计算：[3$\frac{15}{22}$-2$\frac{6}{11}$×（0.125$+\frac{1}{7}$）]×1$\frac{2}{3}$÷0.3．

Answer 1

分析 先算加法，再算中括号里面的乘法，再算减法，再算括号外面的乘法，最后算除法．

解答 解：[3$\frac{15}{22}$-2$\frac{6}{11}$×（0.125$+\frac{1}{7}$）]×1$\frac{2}{3}$÷0.3
=[3$\frac{15}{22}$-2$\frac{6}{11}$×$\frac{15}{56}$]×1$\frac{2}{3}$÷0.3
=[3$\frac{15}{22}$-$\frac{15}{22}$]×1$\frac{2}{3}$÷0.3
=3×1$\frac{2}{3}$÷0.3
=5÷0.3
=$\frac{50}{3}$．

点评 考查了分数和小数四则混合运算，注意运算顺序和运算法则，然后再进一步计算．