=10 nha Thu Hiền

(161616/212121+2022/3033)*7

=10

mk nhanh nhất nha

Đ/s: 10 nhé bạn.

​​​​(161616\212121+2022\3033)*7

=(\(\frac{161616}{212121}+\frac{2022}{3033}\))*7

=(\(\frac{16}{21}+\frac{2}{3}\)​​)*7

=\(\frac{30}{21}\)*7

=\(\frac{210}{21}\)

=10

bằng 10, đúng 100%

\(\frac{28}{3}\)

giải cách làm hộ mình nhé

\(\subset\frac{161616}{212121}+\frac{12036}{21063}\supset\times7\)

\(\subset\frac{161616:10101}{212121:10101}+\frac{12036:1003}{21063:1003}\supset\times7\)

\(\subset\frac{16}{21}+\frac{12}{21}\supset\times7\)

\(\frac{28}{21}\times7\)

\(\frac{196}{21}\)

\(\frac{28}{3}\)

tick đó nha

2:

a: Gọi d=ƯCLN(7n+4;9n+5)

=>63n+36-63n-35 chia hết cho d

=>1 chia hết cho d

=>d=1

=>PSTG

b: Gọi d=ƯCLN(n^3+3n;n^4+3n^2+1)

=>n^3+3n chia hết cho d và n^4+3n^2+1 chia hết cho d

=>n^4+3n^2-n^4-3n^2-1 chia hết cho d

=>-1 chia hết cho d

=>d=1

=>PSTG

c: Gọi d=ƯCLN(12n+1;30n+2)

=>60n+5-60n-4 chia hết cho d

=>1 chia hết cho d

=>d=1

=>PSTG

My hometown is Quang Yen. It is in the west of Quang Ninh Province. It is an ancient land. It is famous for historical sites, festival , Phong Coc communal house, Tien Cong temple, Bach Dang river and 2 Gieng Rung ironwood trees. The weather is hot and dry, I like my hometown very much. People here are very friendly and hospitable

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Giúp làm bài tập 

Bài tập đâu, khổ quá

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đề dưới 

1b

2c

3d

4a

5a

6b

7a

8d

9b

10b

`2^2 .2^3-(2022^0+19):2^2`

`=4.8-(1+19):4`

`=4.8-20:4`

`=32-5`

`=27`

\(2^2\cdot2^3-\left(2022^0+19\right):2^2=4\cdot8-\left(1+19\right):4=32-20:4=32-5=27\)

2^2.2^3-(2022^0+19):2^2
=4.8-(1+19):4
=32-5=27