Question

Thực hiện phép tính :

a. ( -17 ) + 5 + 8 + 17

b. ( -24 ) + 6 + 10 + 24

c. ( -24 ) + 6 + ( -10 ) + 24

d. ( - 456 ) + 2021 - ( 544 )

e.( -1075 ) - 29 - ( -1075 )

f. ( -135 ) + 48 + 140 - ( -5 )

g. 329 + 64 + ( -394 ) + 36

h. ( -427 ) + ( -123 ) + 23 + 27

Answer 1

a: (-17)+5+8+17

\(=\left(-17+17\right)+\left(5+8\right)\)

=0+13

=13

b: \(\left(-24\right)+6+10+24\)

\(=\left(-24+24\right)+\left(6+10\right)\)

=0+16

=16

c: \(\left(-24\right)+6+\left(-10\right)+24\)

\(=\left(-24+24\right)+\left(6-10\right)\)

=0+(-4)

=-4

d: \(\left(-456\right)+2021-544\)

\(=2021-\left(456+544\right)\)

=2021-1000

=1021

e: \(\left(-1075\right)-29-\left(-1075\right)\)

\(=-1075+1075-29\)

=0-29

=-29

f: \(\left(-135\right)+48+140-\left(-5\right)\)

\(=48+\left(-135+140+5\right)\)

=48+10

=58

g: \(329+64+\left(-394\right)+36\)

\(=\left(329-394\right)+\left(64+36\right)\)

=100-65

=35

h: \(\left(-427\right)+\left(-123\right)+23+27\)

\(=\left(-427+27\right)+\left(-123+23\right)\)

=-400-100

=-500