Question

1. Thực hiện phép tính

a) \(25-\left(-75\right)+32-\left(32+75\right)\)

b) \(\left|-127\right|-18.\left(5-6\right)\)

c) \(17-25+55-17\)

Answer 1

a,\(25-\left(-75\right)+32-\left(32+75\right)\))

=\(25+75+32-32-75\)

=\(\left(75-75\right)+\left(32-32\right)+25\)

=\(0+0+25=25\)

\(b,\left|-127\right|-18.\left(5-6\right)\)

\(=127-18.\left(-1\right)\)

\(=127-\left(-18\right)\)

\(=145\)

\(c,17-25+55-17\)

\(=\left(17-17\right)+\left(55-25\right)\)

\(=0+30\)

\(=30\)

Answer 2

a)

25 - (-75) + 32 - ( 32 + 75 )

= 25 + 75 + 32 - 107

=100+32 - 107

=132 - 107

=25

Answer 3

b)

| - 127| - 18 . ( 5 - 6)

=127 - 18 . ( -1)

=127 - (-18)

=145