Question

tính:

a).4x5x6x7

5x6x7x8

b).10x6x7

5x14x8

ai nhanh tick

Answer 1

a) \(\frac{4\times5\times6\times7}{5\times6\times7\times8}\)

 \(=\frac{4\times5\times6\times7}{5\times6\times7\times4\times2}\)

\(=\frac{1}{2}\)

b) \(\frac{10\times6\times7}{5\times14\times8}\)

\(=\frac{5\times2\times6\times7}{5\times7\times2\times8}\)

\(=\frac{3}{4}\)

tự gạch các từ giống nhau nha

Answer 2

a)4/8=1/2

b)2x5x6x7/5x7x2x8=6/8=3/4

Answer 3

\(\frac{4.5.6.7}{5.6.7.8}=\frac{1.1.1.1}{1.1.1.2}=\frac{1}{2}\)