Question

tinh bawng cach thuan tien

4.5 * 16 - 1.7

4.5 * 15 + 2.8

Answer 1

\(\frac{4,5\times16-1,7}{4,5\times15+2,8}=\frac{4,5\times15+4,5-1,7}{4,5\times15+2,8}\)

\(=\frac{4,5\times1,5+2,8}{4,5\times1,5+2,8}\)

\(=1\)

Answer 2

\(\frac{4,5.16-1,7}{4,5.15+2,8}\)

\(=\frac{4,5.15+4,5-1,7}{4,5.15+2,8}\)

\(=\frac{4,5.1,5+2,8}{4,5.1,5+2,8}\)

\(=1\)