1,25-/0,5-x/=0

=>/0,5-x/=1,25

=>0,5-x=1.25

hoặc 0,25-x=-1,25

=>x=-0,75

hoặc x=1,5

8,75*x+1,25*x=20

x*(8,75+1,25)=20

x*10=20

x=20:10

x=2

a, \(=16,24\left(12-3+1\right)\)

\(=16,24.10=162,4\)

b, \(=1,25\left(1+2+7\right)\)

\(=1,25.10=12,5\)

c, \(=2,46\left(2+8\right)\)

\(=2,46.10=24,6\)

\(a,=16,24\times12-16,24\times3+16,24\times1\\ =16,24\times\left(12-3+1\right)=16,24\times10=162,4\\ b,=1,25\times\left(1+2+7\right)=1,25\times10=12,5\)

a 16.24( 12-10+3)=16.24 x 5=81.2

b  1.25(1+2+7)=1.25 x 10= 12.5

c  2.46 x 2 + 2.46 x8 = 2.46(2 + 8)=2.46 x 10=24.6

Bằng 1 UwU

cần phải nói hết bước làm ra ạ

   0,8 x 0,5 x 1,25 x 2,5 x 2 x 0,4

= (0,8 x 1,25) x (0,5 x 2) x (2,5 x 0,4)

= 1 x 1 x 1

= 1 

Tính ra giờ hay s bạn

Tính ra giờ hay s đấy bạn

X : ( 1 + 0,25 + 0,5 + 1,25 ) = 0,45 

X : 3 = 0,45 

X = 0,45 x 3 

X = 1,35

x+x:0,25+x:0,5+x:1,25=0,45

Xx1+Xx4+Xx2+Xx80=0,45

Xx(4+2+80+1)=0,45

Xx87=0,45

x=0,45:87

x=

25/2

181/5

247/2

71/5

a)`1,25 + 1,25 xx 2 + 7 xx 1,25=1,25 xx (1+2+7) = 1,25 xx 10 =12,5`

b)`3,62xx12–2xx0,362xx10=3,62 xx 12 -2 xx 3,62=3,62xx(12-2)=3,62xx10=36,2`

c)`12,35xx15–1,235xx10xx6+12,35=12,35xx15–12,35xx6+12,35=12,35xx(15-6+1)=12,35xx10=123,5`    

d)`1,42 : 0,5 + 1,42 xx 8=1,42xx2+1,42xx8=1,42xx(2+8)=1,42xx10=14,2`

\(1,25:0,5+1,25\times8\\ =1,25\times2+1,25\times8\\ =1,25\times\left(2+8\right)\\ =1,25\times10\\ =12,5\)