题目
计算(1)((11))/(5)×((1)/(3)-(1)/(2))×(3)/((11))÷(5)/(4);(2)16÷(-2)3-(-(1)/(8))×(-4).
计算
(1)$\frac{{11}}{5}×(\frac{1}{3}-\frac{1}{2})×\frac{3}{{11}}÷\frac{5}{4}$;
(2)16÷(-2)3-(-$\frac{1}{8}$)×(-4).
(1)$\frac{{11}}{5}×(\frac{1}{3}-\frac{1}{2})×\frac{3}{{11}}÷\frac{5}{4}$;
(2)16÷(-2)3-(-$\frac{1}{8}$)×(-4).
题目解答
答案
解:(1)原式=$\frac{11}{5}$×(-$\frac{1}{6}$)×$\frac{3}{11}$×$\frac{4}{5}$
=-$\frac{2}{25}$;
(2)原式=-2-$\frac{1}{8}$×4
=-2-$\frac{1}{2}$
=-2$\frac{1}{2}$.
=-$\frac{2}{25}$;
(2)原式=-2-$\frac{1}{8}$×4
=-2-$\frac{1}{2}$
=-2$\frac{1}{2}$.
解析
步骤 1:计算括号内的差
$\frac{1}{3}-\frac{1}{2} = \frac{2}{6}-\frac{3}{6} = -\frac{1}{6}$
步骤 2:将分数相乘
$\frac{11}{5}×(-\frac{1}{6})×\frac{3}{11} = -\frac{11}{5}×\frac{1}{6}×\frac{3}{11} = -\frac{1}{5}×\frac{1}{2} = -\frac{1}{10}$
步骤 3:除以分数
$-\frac{1}{10}÷\frac{5}{4} = -\frac{1}{10}×\frac{4}{5} = -\frac{4}{50} = -\frac{2}{25}$
步骤 4:计算幂和乘法
$(-2)^{3} = -8$
$-\frac{1}{8}×(-4) = \frac{1}{2}$
步骤 5:计算除法和减法
$16÷(-8)-(\frac{1}{2}) = -2-\frac{1}{2} = -2\frac{1}{2}$
$\frac{1}{3}-\frac{1}{2} = \frac{2}{6}-\frac{3}{6} = -\frac{1}{6}$
步骤 2:将分数相乘
$\frac{11}{5}×(-\frac{1}{6})×\frac{3}{11} = -\frac{11}{5}×\frac{1}{6}×\frac{3}{11} = -\frac{1}{5}×\frac{1}{2} = -\frac{1}{10}$
步骤 3:除以分数
$-\frac{1}{10}÷\frac{5}{4} = -\frac{1}{10}×\frac{4}{5} = -\frac{4}{50} = -\frac{2}{25}$
步骤 4:计算幂和乘法
$(-2)^{3} = -8$
$-\frac{1}{8}×(-4) = \frac{1}{2}$
步骤 5:计算除法和减法
$16÷(-8)-(\frac{1}{2}) = -2-\frac{1}{2} = -2\frac{1}{2}$