Question

Bài 1 : Tính

a) ( -5 ) + ( -21 )

b) ( -72 ) + 18

c) ( -11 ) + 50

d) ( -72 ) - 15

e) ( -21 ) - ( -17 )

đ ) 17 - ( -25 )

Answer 1

a) -5+(-21)=-5-21=-26

-72+18=-54

-11+50=39

-72-15=-87

-21-(-17)=-4

17-(-25)=42

Answer 2

\(a) ( -5 ) + ( -21 )=-26\)

\(b) ( -72 ) + 18=-54\)

\(c) ( -11 ) + 50=39\)

\(d) ( -72 ) - 15=-87 \)

\(e) ( -21 ) - ( -17 )=-4 \)

\(đ ) 17 - ( -25 )=42\)