Question

[nguyen quyet chien]

Bài 4.Tính nhanh

a.\(\frac{5}{12}+1-\frac{3}{7}+\frac{2}{24}-\frac{8}{14}\)

b.\(-\frac{23}{4}+\frac{1}{2}+\frac{21}{4}-2\)

Answer 1

[Lê Trần Xuân Nhi]

A ) 1/2

B) -2 

mong bn k chi mik nha

Answer 2

[Fug Buik__( Team ⒽⒺⓋ )]

a)\(\frac{5}{12}+1-\frac{3}{7}+\frac{2}{24}-\frac{8}{14}\)

\(=\frac{5}{12}+1-\frac{3}{7}+\frac{1}{12}-\frac{4}{7}\)

\(=\left(\frac{5}{12}+\frac{1}{12}\right)+1-\left(\frac{3}{7}+\frac{4}{7}\right)\)

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

b)\(-\frac{23}{4}+\frac{1}{2}+\frac{21}{4}-2\)

\(=\left(-\frac{23}{4}+\frac{21}{4}+\frac{2}{4}\right)-2\)

\(=-2\)