a: \(24,8:0,5+24,8\cdot3+24,8:0,2\)

\(=24,8\cdot2+24,8\cdot3+24,8\cdot5\)

\(=24,8\left(2+3+5\right)\)

\(=24,8\cdot10=248\)

b: \(19,5+19,5\cdot3+19,5:0,5+19,5:0,25\)

\(=19,5+19,5\cdot3+19,5\cdot2+19,5\cdot4\)

\(=19,5\left(1+3+2+4\right)\)

\(=19,5\cdot10=195\)

c: \(121,07\cdot4+121,07:0,25+121,07:0,5\)

\(=121,07\cdot4+121,07\cdot4+121,07\cdot2\)

\(=121,07\left(4+4+2\right)\)

\(=121,07\cdot10=1210,7\)

= 19,5 x 4 + 19,5 x 2 + 19,5 x 4 
= 19,5 x ( 4+4+2)
= 19,5 x 10

= 195

...

= 19,5 : 0,25 + 19,5 : 0,25 + 19,5 : 0,25

= (19,5 : 0,25) x 3

= 78 x 3

= 234

19,5 + 19,5 + 19,5 + 19,5 x 7 - 19,5 : 0,1

= 19,5 + 19,5 + 19,5 + 19,5 x 7 - 19,5 x 10

= 19,5 x (1 + 1 + 1 + 7 - 10)

= 19,5 x 0

= 0

19,5 + 19,5 + 19,5 + 19,5 x 7 - 19,5 : 0,1

= 19,5 x 1 + 19,5 x 1  + 19,5 x 1  + 19,5 x 7 - 19,5 x 10

= 19,5 x (1 + 1 + 1 + 7 - 10)

= 19,5 x (10 - 10)

= 19,5 x 0

= 0

~Study well~

\(19,5+19,5+19,5+19,5.7-19,5:0,1\)

\(=19,5+19,5+19,5+19,5.7-19,5.10\)

\(=19,5.1+19,5.1+19,5.1+19,5.7-19,5:\)

\(=19,5.\left(1+1+1+7-10\right)\)

\(=19,5.0\)

\(=0\)

Rất vui vì giúp đc bạn !!!

tính cái gì bạn

error

                    7,83 17980

                                                     k cho mik nha

Bạn làm sai rồi

25,87

\(a,6\cdot\frac{1}{3}+0,75+\frac{3}{4}:0,25\)

\(< =>6\cdot\frac{1}{3}+\frac{3}{4}+\frac{3}{4}:\frac{1}{4}\)

\(< =>2+\frac{3}{4}:\frac{1}{4}\)

\(< =>2+3\)

\(< =>5\)

\(b,19,5\cdot2,2+8,8\cdot19,5-19,5\)

\(< =>42,9+171,6-19,5\)

\(< =>214,5-19,5\)

\(< =>195\)

Lời giải:
a.

$19,5-x=11,625$

$x=19,5-11,625=7,875$

b.

$4,75+x:9=34,266$

$x:9=34,266-4,75=29,516$

$x=29,516\times 9=265,644$

=1656.11 NHA BN

cac bn ung ho minh nha

có ai không giúp mình với 

kết quả hình như bằng 1706 hay sao ý

`( (23,4+19,5)xx7+(23,4+19,5)xx3+11 )/(0,55xx2xx30+5xx11+2,75xx8)`

`= (42,9xx7+42,9xx3+11 )/(1,1xx30+55+22)`

`= (42,9xx(7+3)+11 )/(33+55+22)`

`= (42,9xx10+11 )/(88+22)`

`= (429+11 )/(88+22)`

`= 440/110`

`= 4`