a)(-5/9+-4/9)+-2/11+(8/15+7/15)

=-9/-9+-2/11+15/15

=-1+-2/11+1

=-2/11

b)(7/2.5/6)+(7/6:2/7)

=35/12+(7/6.7/2)

=35/12+49/12

=84/12
=7

a)-3.-12=36

5.8=40

Vì 35<40 nên hai số không bằng nhau

b)3131:1010/5252:1010=31/52

Vì 31/52=31/52 nên hai số bằng nhau

The school I am attending is Nguyen Trai Secondary School. My school was established on August 23, 1981. The school is very large with an area of ​​up to 15,740 square meters, located in Thanh Son 3 area. The teachers are very funny, friendly with students, always instruct enthusiastically and detail . Students are very friendly and kind.

-I live in Uong Bi.

-My house has a yard and balcony.

-My best friend looks very tall and beautiful.

-My best friend is obedient, gentle and good at studying.

-Of course there is.

-I usually clean the house, sweep the house, mop the house,... before Tet.

-My neighboord is in Uong Bi.

-I can see houses,flowers,grass,...

-My neighborhood is very beautiful, clean and peaceful.

-I reraly like living in this neighboord.

OMG

x={-4;-3;-2;-1;0;1;2;3;4;5}
Tổng đó là:

-4+(-3)+(-2)+(-1)+1+2+3+4+5

=5

=16.(-3)-[(-93)+(-3)^3]
=-48-[(-93)+(-27)]
=-48-[(-93-27)]
=-48-(-120)
=-48+120

=72

*=253;211;202;204;205;207;20

A=(2011+2019)+(2012+2018)+(2013+2017)+(2014+2016)+3015

A=4030+4030+4030+4030+2015

A=8060+8060+2015

A=16120+2015

A=18135