Bài làm

C1:  20,18 x 37,9 + 201,8 x 4,5 + 201,8 x 1,75

= 764,822 + 908,1 + 353,15

= 2026,072

C2: 20,18 x 37,9 + 201,8 x 4,5 + 201,8 x 1,75

  = 20,18 x 3,79 x 10 + 201,8 x 4,5 + 201,8 x 1,75

  = 20,18 x 10 x 3,79 + 201,8 x 4,5 + 201,8 x 1,75

  = 201,8 x 3,79 + 201,8 x 4,5 + 201,8 x 1,75

  = 201,8 x ( 3,79 + 4,5 + 1,75 )

  = 201,8 x 10,04

  = 2026,072

C3: 20,18 x 37,9 + 201,8 x 4,5 + 201,8 x 1,75

= \(\frac{2018}{100}x\frac{379}{10}+\frac{2018}{10}x\frac{45}{10}+\frac{2018}{10}x\frac{175}{100}\)

= \(\frac{2018}{100}x\frac{379}{10}+\frac{2018}{10}x\left(\frac{45}{10}+\frac{175}{100}\right)\)

= \(\frac{2018}{100}x\frac{379}{10}+\frac{2018}{10}x\left(\frac{450}{100}+\frac{175}{100}\right)\)

= \(\frac{2018}{100}x\frac{379}{10}+\frac{2018}{10}x\frac{25}{4}\)

= \(\frac{382411}{500}+\frac{10090}{8}\)

= \(\frac{382411}{500}+\frac{630625}{500}\)

= \(\frac{1013036}{500}\)

= \(2026,072\)

# Chúc bạn học tốt #

Cảm ơn bạn nhiều lắm

a, 20,18 x 7,5 + 20,18 + 20,18 + 20,18 : 2

= 20,18 x 7,5 + 20,18 x 1 + 20,18 x 1 + 20,18 x 0,5

= 20,18 x ( 7,5 + 1 + 1 + 0,5)

= 20,18 x 10

= 201,8 

b, 100 : 9   - 79,3 : 9

= (100 - 79,3) : 9

= 20,7 : 9

= 2,3

\(47.20,18+360.2,018+1,7.201,8\)

\(=47.20,18+36.\left(10.2,018\right)+\left(1,7.10\right).20,18\)

\(=47.20,18+36.20,18+17.20,18\)

\(=20,18.\left(47+36+17\right)\)

\(=20,18.100=2018\)

47 x 20,18 + 360 x 2,018 + 1,7 x 201,8

= 47 x 20,18 + 36 x 10 x 2,018 + 1,7 x 10 x 20,18

= 47 x 20,18 + 36 x 20,18 + 17 x 20,18

= 20,18 x ( 47 + 36 + 17 )

= 20,18 x 100

= 2018

Hok tốt !

\(47\times20,18+360\times2,018+1,7\times201,8\)

=\(47\times20,18+36\times10\times2,018+1,7\times10\times20,18\)

=\(47\times20,18+36\times20,18+17\times20,18\)

=\(20,18\times\left(47+36+17\right)\)

=\(20,18\times100\)

=\(2018\)

T**k mik nhé!

\(20,18\times2\frac{2}{5}+201,8\times\frac{97}{22}\times220\%+0,006\times2018\)

\(=20,18\cdot\frac{12}{5}+20,18\cdot10\cdot\frac{97}{22}\cdot\frac{22}{10}+0,006\cdot100\cdot20,18\)

\(=20,18\cdot\frac{12}{5}+20,18\cdot\frac{970}{22}\cdot\frac{22}{10}+0,6\cdot20,18\)

\(=20,18\cdot\frac{12}{5}+20,18\cdot97+\frac{3}{5}\cdot20,18\)

\(=20,18\cdot\left(\frac{12}{5}+\frac{3}{5}\right)+20,18\cdot97\)

\(=20,18\cdot3+20,18\cdot97\)

\(=20,18\cdot\left(97+3\right)\)

\(=20,18\cdot100\)

\(=2018\)

Số lớn nhất: 201,8

số bé nhất: 2,019

Tổng 2 số trên:

201,8 + 2,019= 203,819

`x+ 9,7 = 690,2`     

`=>x=690,2-9,7`

`=>x=680,5`          

`----------`

`x - 20,18 = 21,7`

`=>x= 21,7+ 20,18`

`=>x= 41,88`

`----------`

`x xx 0,4 = 2,6`     

`=>x=2,6 : 0,4`

`=>x=6,5`                    

`---------`

`9,6 : x =0,16`

`=>x= 9,6 : 0,16`

`=>x=60`

`-----------`

`x xx3,4 + x xx 6,6 = 45,2`               

`=>x xx (3,4+ 6,6)=45,2`

`=>x xx 10=45,2`

`=>x=45,2:10`

`=>x=4,52`

`-----------`

`x xx 6 - x : 0,25 = 4,5 `

`=> x xx 6 - x xx 4=4,5`

`=>x xx(6-4)=4,5`

`=>x xx 2=4,5`

`=>x= 4,5 :2`

`=>x= 2,25`

là không biết . đồ khùng

bằng 0

Trần ái ya có cần phải chửi ngta vậy hok trời =.=

39,9375

kiểu gì tick rồi cũng chẳng làm cho đâu nhể

=4,5x2,5+4,5x4,5+4,5x2+4,5

=4,5x(2,5+4,5+2+1)

=4,5x10

=45

4,5 x 2,5 + 4,5 x 4,5 + 2,5 + 4,5 x 2 + 2

4,5x(2,5+4,5+2)+2,5+2

4,5x9+3,5

40,5+3,5=44