Tổng của hai số gấp 5 lần số bé

=>Số lớn gấp 4 lần số bé

Hiệu số phần bằng nhau là 4-1=3(phần)

Số lớn là 135:3x4=180

Số bé là 180-135=45

Sửa đề: 125x456456-456x125125

=125x456x1001-125x456x1001
=0

@Nguyễn Thị Thương Hoài giúp e với ạ

a: \(\left(\dfrac{7}{8}-0,5\right):\left(\dfrac{5}{6}:0,75\right)^2\)

\(=\dfrac{3}{8}:\left(\dfrac{5}{6}:\dfrac{3}{4}\right)^2\)

\(=\dfrac{3}{8}:\left(\dfrac{5}{6}\cdot\dfrac{4}{3}\right)^2\)

\(=\dfrac{3}{8}:\left(\dfrac{10}{9}\right)^2=\dfrac{3}{8}:\dfrac{100}{81}=\dfrac{3}{8}\cdot\dfrac{81}{100}=\dfrac{243}{800}\)

b: \(\left(-0,75\right)-\left[-2+\dfrac{3}{2}\right]:1,5+\dfrac{-5}{4}\)

\(=-2-\dfrac{\left[-2+1,5\right]}{1,5}\)

\(=-2+\dfrac{0,5}{1,5}=-2+\dfrac{1}{3}=-\dfrac{5}{3}\)

c: \(\dfrac{3}{7}\cdot\dfrac{8}{3}-\dfrac{3}{7}\cdot\dfrac{3}{2}\)

\(=\dfrac{3}{7}\left(\dfrac{8}{3}-\dfrac{3}{2}\right)\)

\(=\dfrac{3}{7}\cdot\dfrac{7}{6}=\dfrac{3}{6}=\dfrac{1}{2}\)

d: \(\dfrac{53}{4}:\left(-\dfrac{4}{7}\right)-\dfrac{69}{4}:\left(-\dfrac{4}{7}\right)\)

\(=\left(\dfrac{53}{4}-\dfrac{69}{4}\right):\dfrac{-4}{7}\)

\(=\dfrac{-16}{4}\cdot\dfrac{7}{-4}=7\)

e: \(\dfrac{100}{123}:\left(\dfrac{3}{4}+\dfrac{7}{12}\right)+\dfrac{23}{123}:\left(\dfrac{9}{5}-\dfrac{7}{17}\right)\)

\(=\dfrac{100}{123}:\left(\dfrac{9}{12}+\dfrac{7}{12}\right)+\dfrac{23}{123}:\left(\dfrac{153}{85}-\dfrac{35}{85}\right)\)

\(=\dfrac{100}{123}\cdot\dfrac{12}{16}+\dfrac{23}{123}\cdot\dfrac{85}{118}\)

\(=\dfrac{75}{123}+\dfrac{1955}{123\cdot118}=\dfrac{75\cdot118+1955}{123\cdot118}=\dfrac{10805}{14514}\)

= 388

Độ dài của chim ruồi khổng lồ Nam Mỹ là:

\(5,5\cdot\left(4\dfrac{1}{8}\right)=5,5\cdot4,125=\dfrac{363}{16}\left(cm\right)\)

\(\left(44\times52\times60\right):\left(11\times15\times15\right)\\ =44\times52\times60:11:15:15\\ =\left(44:11\right)\times\left(52:15\right)\times\left(60:15\right)\\ =4\times\dfrac{52}{15}\times4\\ =16\times\dfrac{52}{15}\\ =\dfrac{832}{15}\)

832/15 .

= 0

nhớ tick cho mình !

x = 2445

x:15+42=15+25x8

=>\(x:15=15+200-42=215-42=173\)

=>\(x=173\times15=2595\)

(x:23+45) x67=8911

=>x:23+45=8911:67=133

=>x:23=133-45=88

=>\(x=88\times23=2024\)

x=2024