Question

Tính nhanh

1,\(\frac{1}{2}+\frac{5}{6}:5-\frac{3}{16}.\left(-2\right)^2\)

2,\(1,7.2,3+1,7.\left(-3,7\right)-0,17:0,1\)

 

Giúp mik với thanks

 

Answer 1

\(\frac{1}{2}+\frac{5}{6}\div5-\frac{3}{16}\left(-2\right)^2\)

\(=\frac{1}{2}+\frac{5}{6}\times\frac{1}{5}-\frac{3}{16}.4\)

\(=\frac{3}{6}+\frac{1}{6}-\frac{12}{16}\)

\(=\frac{4}{6}-\frac{12}{16}\)

\(=\frac{32}{48}-\frac{36}{48}\)

\(=\frac{-4}{48}=\frac{-1}{12}\)

Answer 2

\(1,7\times2,3+1,7\times\left(-3,7\right)-0,17\div0,1\)

\(=1,7\times2,3+1,7\times\left(-3,7\right)-1,7\)

\(=1,7\times\left(2,3-3,7-1\right)\)

\(=1,7\times\left(-2,4\right)\)

\(=-4,08\)