6,15 : 0,5 + 6,15 : 0,2 + 3 x 6,15

= 6,15 x 2 + 6,15 x 5 + 3 x 6,15 

= 6,15 x ( 2 + 3 + 5 )

= 6,15 x 10 

= 61,5

2 ở đâu thế bn

a) \(6,15:0,5+6,15:0,2+3x6,15\)

\(=6,15x\left(1:0,5+1:0,2+3\right)=6,15x\left(2+5+3\right)=6,15x10=61,5\)

b) \(0,215x74,24+25,76x0,215+18,5\)

\(=0,215x\left(74,24+25,76\right)+18,5=0,215x100+18,5=21,5+18,5=40\)

`@` `\text {Ans}`

`\downarrow`

`4,`

`a)`

\( 6,15 \div 0,5 + 6,15 \div 0,2 + 3 \times 6,15 \)

`= 6,15 \times 2 + 6,15 \times 5 + 3 \times 6,15`

`= 6,15 \times (2 + 5 + 3)`

`= 6,15 \times 10`

`= 61,5`

`b)`

`0,215 \times 74,24 + 25,76  \times 0,215 + 18,5 `

`= 0,215 \times (74,24 + 25,76) + 18,5`

`= 0,215 \times 100 + 18,5`

`= 21,5 + 18,5`

`=40`

`a)=45xx4xx2xx0,5`

`=180xx1=180`

`b)0,86xx8xx15xx1,25`

`=0,86xx15xx8xx1,25`

`=12,9xx10=129`

`c)=7,3xx(6,17+3,9)`

`=7,3xx10,07=73,511`

`d)=6,15xx(3/4+1/4)`

`=6,15xx1=6,15`

=56,24+(360,288:4,8)-(6,15*13,6)

=56,24+75,06-85

=131,3-85

=46,3

(6,15 + 10,85) : 8 

=17:8

=2,125

bằng 2,125 nha bạn.

( 6,15 + 10,85 ) : 8 

= 17 : 8

= 2,125

~ Chúc bn hok tốt ~

a) 26,8 x 3 + 0,82 = 80,4 + 0,82 = 81,22
b) 6,15 x 5 + 2,3 x 4 = 30,75 + 9,2 = 39,95
c) 18,7 – 0,75 x 3 = 18,7 – 2,25 = 16,45.

332,888

tick nhétrương tn

đúng rồi đó

12 = 2².3

27 = 3³

ƯCLN(12; 27) = 3

ƯC(12; 27) = Ư(3) = {1; 3}

--------

6 = 2.3

15 = 3.5

ƯCLN(6; 15) = 3

ƯC(6; 15) = Ư(3) = {1; 3}

--------

21 = 3.7

10 = 2.5

12 = 2².3

ƯCLN(21; 10; 12) = 1

ƯC(21; 10; 12) = Ư(1) = {1}