Toán Lớp 8: Tính giá trị của biểu thức:
A= 3/229 . ( 2 + 1/433) -1/229 . 432/433 – 4 /229 . 433
giúp mik vs mi phải nộp gấp
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Toán Lớp 8: Tính giá trị của biểu thức:
A= 3/229 . ( 2 + 1/433) -1/229 . 432/433 – 4 /229 . 433
giúp mik vs mi phải nộp gấp
Comments ( 1 )
A = \dfrac{3}{{229}}.\left( {2 + \dfrac{1}{{433}}} \right) – \dfrac{1}{{229}}.\dfrac{{432}}{{433}} – \dfrac{4}{{229.443}}\\
= \dfrac{3}{{229}}.\dfrac{{867}}{{433}} – \dfrac{{432}}{{229.433}} – \dfrac{4}{{229.433}}\\
= \dfrac{1}{{229.433}}.\left( {3.867 – 432 – 4} \right)\\
= \dfrac{1}{{229.433}}.2165\\
= \dfrac{5}{{229}}
\end{array}$