Question

[Alex Arrmanto Ngọc]

Đề bài :

a) 4567 + 1234 - 4567 - (-66)

b) 2004 - 15 + 54 - 2004 - 54

c) -45789 - 357 - 45789 + 57

Answer 1

[Nguyễn Lê Phước Thịnh]

a) Ta có: \(4567+1234-4567-\left(-66\right)\)

\(=4567-4567+1234+66\)

\(=1234+66=1300\)

b) Ta có: \(2004-15+54-2004-54\)

\(=\left(2004-2004\right)+\left(54-54\right)-15\)

\(=0+0-15\)

\(=-15\)

c) Ta có: \(-45789-357-45789+57\)

\(=-91578-300=-91878\)