0,9 : 0,25 + 1.05 : 0,25 

= (0,9+ 1,05) : 0,25

=0,4875

tk mk nha bn

Mình nghĩ giải thế này:

(0.9+1.05):0.25

=1.95:0.25

=7.8

0.9 : 0.25 + 1.05 : 0.25

=(0.9 + 1.05) : 0.25

= 1.95 : 0.25

= 7.8

Có ai ko giúp mik với

  48,5:4 + 51,5 \(\times\) 0,25 + 1,5

= 48,5 \(\times\) 0,25 + 51,5 \(\times\) 0,25 + 1,5

= 0,25 \(\times\)( 48,5 + 51,5) + 1,5

= 0,25 \(\times\) 100 + 1,5

= 25 + 1,5

= 26,5 

nhanh nhanh nha

13, 25 : 0, 5 + 13, 25 : 0, 25 + 13, 25 : 0, 125

= 13, 25 . 2 + 13, 25 . 4 + 13, 25 . 8

= 13, 25 . ( 2 + 4 + 8 )

= 13, 25 . 14

= 185, 5

nhưng sao lại phải nhân 2;4;8

\(\dfrac{1}{10}+\dfrac{1}{2}:0,5-\dfrac{1}{4}:0,25+\dfrac{1}{8}:0,125\)

\(=\dfrac{1}{10}+\dfrac{1}{2}\times2-\dfrac{1}{4}\times4+\dfrac{1}{8}\times8\)

\(=\dfrac{1}{10}+1-1+1\)

\(=\dfrac{1}{10}+1=\dfrac{1}{10}+\dfrac{10}{10}=\dfrac{11}{10}\)

\(\dfrac{1}{10}+\dfrac{1}{2}\div0,5-\dfrac{1}{4}\div0,25+\dfrac{1}{8}\div0,125\)

= 0,1 + 0,5 x 2 - 0,25 x 4 + 0,125 x 8

= 0,1 + 1 - 1 + 1

= 1,1 - 1 +1

= 0,1 + 1

= 1,1

`#3107.101107`

\(\dfrac{1}{10}+\dfrac{1}{2}\cdot0,5-\dfrac{1}{4}\div0,25+\dfrac{1}{8}\div0,125\)

\(=\dfrac{1}{10}+\left(\dfrac{1}{2}\div0,5\right)-\left[\left(\dfrac{1}{2}\right)^2\div\left(0,5\right)^2\right]+\left(\dfrac{1}{2}\right)^3\div\left(0,5\right)^3\)

\(=\dfrac{1}{10}+\left(\dfrac{1}{2}\div0,5\right)-\left(\dfrac{1}{2}\div0,5\right)^2+\left(\dfrac{1}{2}\div0,5\right)^3\)

\(=\dfrac{1}{10}+1-1^2+1^3\)

\(=\dfrac{1}{10}+1\)

\(=\dfrac{11}{10}\)

ta có: A:0.25=A x 4

Ta có

A)(40.7-17.5)x4

=23.2x4=92.8

B)ko biết:)))))))))))))))))))))))))))

4.7 : 0.25 + 5.3 x 4 = 4.7 : 1/4 + 5.3 x 4

                             = 4.7 x 4 + 5.3 x 4

                             = 4 x ( 4.7 + 5.3 )

                             = 4 x 10

                             = 40

đúng 10000000000000000000000000000000000000%

tk mk nhé

4,7 : 0,25 + 5,3 x 4

= 4,7 x 4 + 5,3 x 4

= ( 4,7 + 5,3 ) x 4

= 10 x 4

= 40

Đúng 100%

Đúng 100%

Đúng 100%

\(4,7:0,25+5,3\times4=4,7:\frac{1}{4}+5,3\times4=4,7\times4+5,3\times4=4\times\left(4,7+5,3\right)=4\times10=40\)

= 25 x 75/100 + 75 x 0.92 + 25 x 0.25 + 75 x 8/100
= 25 x 0.75 + 75 x 0.92 + 25 x 0.25 + 75 x 0.08
= 25 x ( 0.75 + 0.25 ) + 75 x ( 0.92 + 0.08 )
= 25 x 1 + 75 x 1 
= ( 25 + 75 ) x 1 
= 100 x 1
= 100

bằng 2019

   0,2019 : 0,01 + 20,19 x 95 + 20,19 : 0,25

= 0,2019 x 100 + 20,19 x 95 + 20,19 x 4

= ( 0,2019 x 100 ) + 20,19 x 95 + 20,19 x 4

= 20,19 + 20,19 x 95 + 20,19 x 4

= 20,19 x ( 1 + 95 + 4)

= 20,19 x 100

= 2019

làm đúng rồi đó