a) 19,75 x 0,4 x 2,5

= 19,75 x (0,4 x 2,5)

= 19,75 x 1 

= 19,75

b) 9,67 x 80 x 1,25

= 9,67 x (80 x 1,25)

= 9,67 x 100

= 967

c) 49,6 x 0,5 x 4

= 49,6 x (0,5 x 4)

= 49,6 x 2

= 99,2

d) 0,25 x 0,2 ,x 4 x 50

= (0,25 x 4) x (0,2 x 50)

= 1 x 10 

= 10

a)

= 19,75 x ( 0,4 x 2,5 )

= 19,75 x 1

= 19,75

b)

= 9,67 x ( 80 x 1,25 )

= 9,67 x 100

= 967

c)

= 49,6 x ( 0,5 x 4 )

= 49,6 x 2 

= 99,2

d)

= ( 0,25 x 4 ) x ( 0,2 x 50 )

= 1 x 10

= 10

a) 19,75✖0,4✖2,5

=19,75✖1

=19,75

b)9,67✖80✖1,25

=9,67✖100

=967

c)49,6✖0,5✖4

=49,6✖2

=99,2

d)0,25✖0,2✖4✘50

=(0,25✖4)✖(0,2✖50)

=1✖10

=10

a: \(=38,75\cdot10=387,5\)

\(a,2,3:0,25+7,7.4\\ =2,3.4+7,7.4\\ =\left(2,3+7,7\right).4=10.4=40\\ b,4,2.8+5,8:0,125\\ =4,2.8+5,8.8\\ =\left(4,2+5,8\right).8=10.8=80\\ c,3,4.4+5,6:0,25+4\\ =3,4.4+5,6.4+4\\ =\left(3,4+5,6+1\right).4=10.4=40\\ d,4:0,2+12:0,5+1,2:0,25\\ =4.5+12.2+1,2.4\\ 4.5+6.4+1,2.4\\ =4\left(5+6+1,2\right)\\ =4.12,2=48,8\)

❤

a) 264,14 : 0,25 : 4

=264,14:( 0,25 x 4)

=264,14:1

=264,14

b)36,45 : 0,2 x 2

=36,45 x 5x 2

=36,45 x (5x2)

=36,45 x 10

=364,5

Tick nha, lần sau giúp nữa

\(2020:0,2+2020+2020:0,25\)

\(=2020:\dfrac{1}{5}+2020+2020:\dfrac{1}{4}\)

\(=2020\times5+2020+2020\times4\)

\(=2020\times \left(5+1+4\right)\)

\(=2020\times10\)

\(=20200\)

\(13,25:0,5+13,25:0,2+13,25:0,25\\ =13,25\times2+13,25\times5+13,25\times4\\ =13,25\times\left(2+5+4\right)\\ =13,25\times11\\ =145,75\)

\(=13,25:\left(0,5+0,2+0,25\right)\\ =13,25:1,25=10,6\)

13,25 : 0,5+ 13,25 : 0,2 + 13,25 : 0,25
= 13,25 x2 + 13,25 x 5+ 13,25 x 4
= 13,25x ( 2+ 5+ 4)
= 13,25 x 11
=145,75

`13,25 : 0,5 + 13,25 : 0,2 + 13,25 : 0,25`

`= 13,25 : 1/2 + 13,25 : 1/5 + 13,25 : 1/4`

`= 13,25 xx 2 + 13,25 xx 5 + 13,25 xx 4`

`= 13,25 xx ( 2 + 5 + 4)`

`= 13,25 xx 11`

`= 145,75`