63/200 nha

7,75 x 3,8 + 7,75 x 6,2 

= 7,75 x ( 3,8 + 6,2 )

= 7,75 x 10

= 77,5

\(3,7\times3,8+6,2\times3,7\\ =3,7\times\left(3,8+6,2\right)\\ =3,7\times10\\ =37\\ 56,8\times76,9-56,8\times76,8\\ =56,8\times\left(76,9-76,8\right)\\ =56,8\times0,1\\ =5,68\)

a)\(3,7\times3,8+6,2\times3,7\)
\(=3,7\times\left(3,8+6,2\right)\)
\(=3,7\times10=37\)
b)\(56,8\times76,9-56,8\times76,8\)
\(=56,8\times\left(76,9-76,8\right)\)
\(=56,8\times0,1=5,68\)

3,8 × 1/2 + 6,2 × 0,5

= ( 3,8 + 6,2 ) × 0,5

= 10 × 0,5

= 5

124,1 × 9 + 124,1

= 124,1 × ( 9 + 1 )

= 124,1 × 10

= 1241

   201,7 x 8,02 +201,7 : 4/3 + 201,7 x 1,98 - 0,75 x 201,7

=(201,7 x 8,02 + 

201,7 x 1,98)+

 (201,7 : 4/3 -0,75x201,7)

=(201,7x10)+(201,7.3/4-3/4x201,7)

=2017+0

a: Ta có: \(\left(x-7\right)\times22=\left(5\times x\right)+33\)

=>22x-154=5x+33

=>22x-5x=154+33

=>17x=187

=>x=11

b: TA có: \(7,75-\left(0,5\times x:5-6,2\right)=5\)

=>\(0,1\times x-6,2=7,75-5=2,75\)

=>\(0,1\times x=6,2+2,75=8,95\)

=>x=8,95:0,1=89,5

c: \(7:\left(3,8\times x-\frac{57}{19}+3\right)=1,75\)

=>\(7:\left(3,8\times x\right)=1,75\)

=>\(3,8\times x=7:1,75=4\)

=>\(x=\frac{4}{3,8}=\frac{20}{19}\)

    201,7 x 8,02 + 201,7 : \(\frac{4}{3}\)+ 201,7 x 1,98 - 0,75 x 201,7

= 201,7 x 8,02 + 201,7 x \(\frac{3}{4}\)+ 201,7 x 1,98 - 0,75 x 201,7

= 201,7 x ( 8.02 + \(\frac{3}{4}\)+ 1,98 - 0,75)

= 201,7 x ( 8,02 + 1,98, + \(\frac{3}{4}\)- 0,75)

= 201,7 x  10

= 2017

=3,7x(3,8+6,2)-(4,539+5,461)

=3,7x10-10

=37-10

=27

t tôi nha bn

bằng 27. chỉ biết thế thôi

a) \(2,8\times19,35-2,8\times19,35\)

\(=2,8\times\left(19,35-19,35\right)\)

\(=2,8\times0\)

\(=0\)

b) \(56,08\times93,23-56,08\times83,23\)

\(=56,08\times\left(93,23-83,23\right)\)

\(=56,08\times10\)

\(=560,8\)

c) \(1,3856\times194-1,3856\times94\)

\(=1,3856\times\left(194-94\right)\)

\(=1,3856\times100\)

\(=138,56\)

d) \(28,524\times3,8+28,524\times6,2\)

\(=28,524\times\left(6,2+3,8\right)\)

\(=28,524\times10\)

\(=285,24\)

c) \(101\times0,128-0,128\)

\(=0,128\times\left(101-1\right)\)

\(=0,128\times100\)

\(=12,8\)

a: =2.8*(19,35-19,35)=0

b: =56,08(93,23-83,23)

=10*56,08=560,8

c: =1,3856(194-94)

=1,3856*100

=138,56

d: =28,524*(3,8+6,2)

=28,524*10

=285,24

e: =0,128*100

=12,8