Question

tính nhanh :

c) 637 x 527 - 189  /  526 x 637 + 448

d) 677 x 874 + 251  /  678 x 874 - 623

Answer 1

\(\frac{637\times527-189}{526\times637+448}\)

\(=\frac{637\times\left(526+1\right)-189}{526\times637+448}\)

\(=\frac{637\times526+637-189}{526\times637+448}\)

\(=\frac{637\times526+448}{526\times637+448}\)

\(=1\)

Answer 2

\(\frac{677\times874+251}{678\times874-623}\)

\(=\frac{677\times874+251}{\left(677+1\right)\times874-623}\)

\(=\frac{677\times874+251}{677\times874+874-623}\)

\(=\frac{677\times874+251}{677\times874+251}\)

\(=1\)

Answer 3

\(\frac{637\times527-189}{526\times637+448}\)

\(=\frac{526\times637+637-189}{526\times637+448}=\frac{526\times637+448}{526\times637+448}=1\)

Answer 4

UwU

 

Answer 5

 = 1 nhớ tick cho mk nha