a)

-37 +14 +26+37=(-37+37)+(14+26)=30

b) =(-24+24)+(6+10)=16

c)=(-23+23)+(25+15)=40

d)=(-33+33)+(-50+60)=10

e)=(-209+209)+[-14+(-16)]=-30

1) ( - 37 ) + 14 + 26 + 37

= ( - 37 + 37 ) + 14 + 26

= 0 + 40

= 40

2) ( - 24 ) + 6 + 10 + 24

= ( - 24 + 24 ) + 6 + 10

= 0 + 16

= 16

3) 15 + 23 + ( - 25 ) + ( - 23 )

= ( 23 - 23 ) + ( 15 - 25 )

= 0 - 10

= - 10

4) 60 + 33 + ( - 50 ) + ( - 33 )

= ( 60 - 50 ) + ( 33 - 33 )

= 10 + 0

= 10

( - 16 ) + ( - 209 ) + ( - 14 ) + 209

= ( - 16 - 14 ) + ( - 209 + 209 )

= - 30 + 0

= - 30

35 : 7 = 5

= 5

a: =-80

b: =14-34=-20

a) (-30)+(-20)=-50

b (-26)+14+(-34)+26

=(-26+-34)+(14+26)

=-60+40

=-20

= (-2013).2.1007 + 1007.26

= (-4026).1007 + 1007.26

= 1007.(-4026 + 26)

= 1007.(-4000)

= -4028000

LIK-E mik nha bạn

ket ban nhe

(-112).2.(-26).(-321) < 0

\(A= 126 : (4^2 +2)\\A= 126:(16 +2)\\A=126:18\\A= 7\)

a)  ( − 225 ) . ( − 336 ) > 0

b)  ( − 112 ) .2. ( − 26 ) . ( − 321 ) < 0

a) \(\frac{3}{5}\cdot\frac{13}{46}-\frac{1}{10}\cdot\frac{16}{23}=\frac{39-16}{10\cdot23}=\frac{1}{10}\)

b) \(\frac{3}{7}\cdot\frac{9}{26}-\frac{1}{14}\cdot\frac{1}{13}=\frac{27-1}{14\cdot13}=\frac{2\cdot13}{2\cdot7\cdot13}=\frac{1}{7}\)