Toán

\(\dfrac{a}{b}=\dfrac{2^3\cdot3\cdot5}{2^2\cdot5^4}=2\cdot\dfrac{3}{5^3}=\dfrac{6}{125}\)

c: =4,3+2-12-4,3=-10

d: =5x(-0,1)=-0,5

f: =(-1,1):3+1,1

=11/15

c: =9+2,021=11,021

d: =3,886

e: =4,7

f: =3,04

3/10 = 0,3

5/100 = 0,05

-2/5 = -0,4

- 339/2500 = -0,1356

-16/20 = - 0,8

15/6 = 2,5

0,1=1/10

-0,32=-8/25

10,25=1025/100=41/4

-2,55=-255/100=-51/20

15,4=154/10=77/5

-5,60=-28/5

`[45xx16-17]/[45xx15+28]`

`=[45xx(15+1)-17]/[45xx15+28]`

`=[45xxx15+45-17]/[45xx15+28]`

`=[45xx15+28]/[45xx15+28]=1`

Ư(2022) = { 2;3;...;1011;2022 }

a: ĐKXĐ: \(x\in R\)

b: ĐKXĐ: 12x+5>=0

hay x>=-5/12

\(=\dfrac{63\cdot100}{101\cdot21-7\cdot4}=\dfrac{63\cdot100}{7\left(101\cdot3-4\right)}=\dfrac{9\cdot100}{303-4}=\dfrac{900}{299}\)

\(\dfrac{35}{49}=\dfrac{35:7}{49:7}=\dfrac{5}{7}\)

\(\dfrac{35}{49}kg=\dfrac{5}{7}kg\) gạo

5/7 kg gạo