Thực hiện phép tính: 1 5/27 + 7/23 + 1/2 - 5/27 + 16/23
Giải thích
a) \[1\frac{5}{{27}} + \frac{7}{{23}} + \frac{1}{2} - \frac{5}{{27}} + \frac{{16}}{{23}}\]
\[ = \left( {1\frac{5}{{27}} - \frac{5}{{27}}} \right) + \left( {\frac{7}{{23}} + \frac{{16}}{{23}}} \right) + \frac{1}{2}\]
\[ = 1 + 1 + \frac{1}{2} = 2\frac{1}{2}\]
b) \(2023 - {\left( {\frac{1}{3}} \right)^2}{.3^2} = 2023 - \frac{1}{{{3^2}}}{.3^2} = 2023 - 1 = 2022\)