Tinh:
B=\(\frac{\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}}{\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}}\)
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Thực hiện phép tính
\(\frac{\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}}{\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{23}.\frac{1}{7}.\frac{1}{1009}}+\frac{1}{\left(23+7\right).1009-160}\)
tinh
\(A=\left(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\right):\left(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}\right)+1:\left(30.1009-160\right)\)
tinh
A=(\(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\)):(\(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}\cdot\frac{1}{23}\cdot\frac{1}{1009}\))+1:(30.1009-160)
A = [ \(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\)] :\(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}\)] + 1: [30.1009-160]
Tìm A
Tính giá trị của biểu thức sau:
\(A=\left(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\right):\left(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}\right)+1:\left(30.1009-160\right)\)
tính giá trị biểu thức sau:
A= (\(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\)):(\(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}\) )+1:(30.1009-160)
\(A=\left(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\right):\left(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}\right)+1:\left(30.1009-160\right)\)
\(=\frac{23.1009+7.1009-7.23}{7.23.1009}:\frac{7.1009+23.1009-23.7+1}{7.23.1009}+\frac{1}{30.1009-160}\)
\(=\frac{30109}{7.23.1009}.\frac{7.3.1009}{30110}+\frac{1}{30110}\)
\(=\frac{30109}{30110}+\frac{1}{30110}=\frac{30110}{30110}=1\)
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B=(\(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\)) : (\(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}\cdot\frac{1}{23}\cdot\frac{1}{1009}\))+1: (30.1009-160)
Tính giá trị biểu thức
\(B=\left(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\right):\left(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}\right)+1:\left(30.1009-160\right)\)
tính = cách hợp lí:
B=\(\left(\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}\right):\left(\frac{1}{23}+\frac{1}{7}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}\right)+1:\left(30.1009-160\right)\)