Question

Bài 2: Tính nhanh

a) (35-815)-(795-65)         

b) 5-197-2015-2015

c) 1259-1409-12+1259+1409

d) -5+(-37)-45+151-37+151

e) 53-145-359-53+145-259

Answer 1

\(a.\left(35-815\right)-\left(795-65\right)\\ =35-815-795+65\\ =\left(35+65\right)-\left(815+795\right)\\ =100-1610=-1510\)

Answer 2

Bài 2: 

a: Ta có: \(\left(35-815\right)-\left(795-65\right)\)

\(=35-815-795+65\)

\(=100-1600\)

=-1500

b: Ta có: \(5-197-2015-2015\)

\(=-2010-2212\)

=-4222

c: Ta có: \(1259-1409-12+1259+1409\)

\(=2518-12\)

=2506