Question

tinh bang cach hop lin 254 +399x253/254x399-145

Answer 1

\(\frac{254+399.253}{254.399-145}=\frac{254+399.253}{\left(253+1\right).399-145}=\frac{254+399.253}{253.399+\left(399-145\right)}\)

\(=\frac{399.253+254}{399.353+354}=1\)