0,25×12÷0,15-(2,04+10,2÷2,5)÷0,51

=0,25×12÷0,15-(2,04+4,08)÷0,51

=0,25×12÷0,15-6,12÷0,51

=3÷0,15-6,12÷0,51

=20-6,12÷0,51

=20-12

=8

\(\text{0,25×12÷0,15-(2,04+10,2÷2,5)÷0,51}=8\)

0,25 x 12 : 0,15 - (2,04 + 10,2 : 2,5) : 0,51

= \(\frac{1}{4}x12:\frac{3}{20}-\left(\frac{51}{25}+\frac{51}{5}:\frac{5}{2}\right):\frac{51}{100}\)

\(=20-\frac{1377}{50}x\frac{100}{51}\)

\(=20-54=-34\)

0,25*12:0,15-(2,04-10,2:2,5):0,51=24

tính nhanh nha

0,25.12:0,15-(2,04+10,2:25):0,51=3:0,15-(2,04-0,408):0,51=20-1,632:0,51=20-3,2=16,8

0,25x12:0,15-(2,04+10,2:25):0,51=15,2

0,25 x 12 : 0,15 - ( 2,04 + 10,2 : 25 ) : 0,51

= 0,25 x 12 : 0,15 - ( 2,04 + 0,408 ) : 0,51

= 0,25 x 12 : 0,15 - 2,448 : 0,51

= 3 : 0,15 - 4,8

= 20 - 4,8

=  15,2

C1: 1,11 : 0,15 - 0,51 : 0,15

= (1,11 - 0,51) : 0,15

= 0,6 : 0,15 = 4

C2: 1,11 : 0,15 - 0,51 : 0,15

= 7,4 - 3,4 = 4

1,11:0,15-0,51:0,15

=(1,11-0,51):0,15

=0,6:0,15

=4

C2:1,11:0,15-0,51:0,15

    =7,4-3,4

=4

Chúc bn học tốt

Giúp mình với!

51,85
41,526

=51.85

=41.526

a) \(\left(\dfrac{1}{4}x\right):3=\dfrac{5}{6}:\dfrac{1}{8}\\ \left(\dfrac{1}{4}x\right):3=\dfrac{20}{3}\\ \dfrac{1}{4}x=\dfrac{20.3}{3}\\ \dfrac{1}{4}x=20\\ x=80\)

a: Ta có: \(\dfrac{0.25x}{3}=\dfrac{5.6}{0.125}\)

\(\Leftrightarrow x\cdot\dfrac{1}{4}=134.4\)

hay x=537,6

b: Ta có: \(\dfrac{2.5}{7.5}=x:\dfrac{3}{5}\)

\(\Leftrightarrow x:\dfrac{3}{5}=\dfrac{1}{3}\)

hay \(x=\dfrac{1}{5}\)

\(\dfrac{5}{2}:\dfrac{15}{2}=x:\dfrac{7}{5}\\ x:\dfrac{7}{5}=\dfrac{1}{3}\\ x=\dfrac{7}{15}\)

a) Ta có: \(\left(-2.5\cdot0.38\cdot0.4\right)-\left[0.125\cdot3.15\cdot\left(-8\right)\right]\)

\(=\left(-1\cdot0.38\right)-\left[-1\cdot3.15\right]\)

\(=-0.38+3.15\)

\(=\dfrac{277}{100}\)

b) Ta có: \(\left[\left(-20.83\right)\cdot0.2+\left(-9.17\right)\cdot0.2\right]:\left[2.47\cdot0.5-\left(-3.53\right)\cdot0.51\right]\)

\(=\dfrac{0.2\left(-20.83-9.17\right)}{3.0353}\)

\(=\dfrac{0.2\cdot\left(-30\right)}{3.0353}=\dfrac{-60000}{30353}\)

-2,5-/x-0,15/=0

      /x-0,15/=(-2,5)-0

     /x-0,15/=-2,5

    =)ko có giá trị của x

86,7 + 9,8 - 12,73 + 10,2

= ( 86,7 -12,73) + ( 9,8 + 10,2)

= 73,97 + 20

= 93,97

45,82 x 9 - 45,82  x 2,5 x 2 + 15, 82

= 45,82 x 9 - 45,82  x 5 + 15,82

= 45,82 x (9-5) + 15,82

= 45,82 x 4 + 15,82

= 183,28 + 15,82

= 199,1

thanks