19.25+9.25+19.30= 29.2+19.30

                          =48.5

19.25+9.95+19.30

=19.25+19.45+19.30

=19.(25+45+30)

=19.100

=1900

sai đề phải ko bạn 

19x25+9x95+19x30

=19x25+(9x5)x19+19x30

=19x25+45x19+19x30

=19x(25+45+30)

=19x100

=1900

TICK mình nha!!!!!!mình chắc chắn đúng luôn!!!!!!!!!!!!

19.25+9.95+19.30

=19.25+9.5.19+19.30

=19(25+45+30)

=19.100

=1900

=19.25+9.5.19+19.30

=19.(25+9.5+30)

=19.100

=1900

sao Hermione mà không làm được mấy bài toán của Muggle vậy?

B=19.25+9.95+19.30

  =19.25+9.5.19+19.30

  =19.25+45.19+19.30

  =19(25+45+30)

  =19.100

  =1900

B = 19.25 + 9.95 + 19.30

B = 19 . 25 + 45 . 19 + 19 . 30

B = 19 . ( 25 + 45 + 30 )

B = 19 . 100

B = 1900

B = 19 x 25 + 9 x 95 + 19 x 30

B = 19 x 25 + 9 x 5 x 19 + 19 x 30

B = 19 x ( 25 + 9 x 5 + 30 )

B = 19 x 100 = 1900

A = (-8).25.(-2).4.(-5).125

=> A = [(-8).125].(25.4).[(-2).(-5)]

=> A = -1000.100.10

=> A = -1000000

= 1000000 nha bạn

A=(-8).25.(-2).4.(-5).125

A=(-8).125.25.4.(-2).(-5)

A=(-1000).100.10

A=-1000000

B=19.25+9.95+19.30

B=19.25+9.5.19+19.30

B=19(25+9.5+30)

B=19(25+45+30)

B=19.100

B=1900

19.25 + 9.95 + 19.30

= 19.25 + 9.5.19 + 19.30

= 19.25 + 19.45 + 19.30

= 19.(25 + 45 + 30)

= 19.100

= 1900

1900

tich nha nha nha @@@@@@@@@@

=1900 duyet di bn

\(A=(-8).25.(-2).4.(-5).125\)

\(A=(-8.125).(25.4).(-2.-5)\)

\(A=-1000.100.10\)

\(A=-1000000\)

\(B=19.25+9.95+19.30\)

\(B=19.25+9.19.5+19.30\)
\(B=19.25+19.45+19.30\)

\(B=19(25+45+30)\)

\(B=19.100\)

\(B=1900\)

a) (-8).25.(-2).4.(-5).125

=[(-2).(-5)].(25.4).[125.(-8)]

=10.100.(-1000)

=-1000000

b)19.25+9.95+19.30

=19.25+19.5.9+19.30

=19.(25+5.9+30)

=19.100

=1900

\(A=\left(-8\right).25.\left(-2\right).4.\left(-5\right).125\)

\(A=\left[\left(-8\right).125\right].\left(25.4\right).\left[\left(-5\right).\left(-2\right)\right]\)

\(A=\left(-1000\right).100.10\)

\(A=\left(-1000\right).1000\)

\(A=-1000000\)

\(B=19.25+9.95+19.30\)

\(B=\left(19.25\right)+\left(9.19.5\right)+\left(19.30\right)\)

\(B=\left(19.25\right)+\left(19.45\right)+\left(19.30\right)\)

\(B=19.\left(25+45+30\right)\)

\(B=19.100\)

\(B=1900\)