giúp mình bài này với mọi người 

A)21/56 và40/56

B)4/12;6/12 và 10/12

3/4+8/9-2/3=27/36+32/36-24/36=35/36 nha

HT

3/4 + 8/9 - 2/3 = 27/36 + 32/36 - 24/36 = 59/36 - 24/36 = 35/36

Chúc bạn học tốt.

😁😁😁

Diện tích hình bình hành là: 24 x 15 = 360 (m²)

Đ/S: 360 m²

minh ne 24dm = 240 cm

240x15=3600 cm

DS 3600 cm

nho k minh day

a) (1/3 + 1/5) x 1/2

Cách 1: (1/3 + 1/5) x 1/2 = 8/15 x 1/2 = 4/15

Cách 2: (1/3 + 1/5) x 1/2 = 1/3 x 1/2 + 1/5 x 1/2 = 1/6 + 1/10 = 4/15

b) (1/3 - 1/5) x 1/2

Cách 1: (1/3 - 1/5) x 1/2 = 2/15 x 1/2 = 1/15

Cách 2: (1/3 - 1/5) x 1/2 = 1/3 x 1/2 - 1/5 x 1/2 = 1/6 - 1/10 = 1/15

Chúc bạn học tốt.

😁😁😁

5/2

HT

  (3/5:22/25)x11/3
=(3/5x25/22)x11/3
=15/22x11/3
=5/2
~HT~

Trả lời :

a)17/3

b)9/5

c)3/2

d)5/11

@Phuonwkhank

~học tốt~

a, \(2+\frac{11}{3}\)
= \(\frac{2}{1}+\frac{11}{3}\)
=\(\frac{6}{3}+\frac{11}{3}\)
=\(\frac{17}{3}\)
b, \(\frac{24}{5}-3\)
=\(\frac{24}{5}-\frac{3}{1}\)
=\(\frac{24}{5}-\frac{15}{5}\)
=\(\frac{9}{5}\)
c, \(2\times\frac{3}{4}\)
=\(\frac{2}{1}\times\frac{3}{4}\)
=\(\frac{6}{4}\)
=\(\frac{3}{2}\)
d, \(2:\frac{22}{5}\)
=\(2\times\frac{5}{22}\)
=\(\frac{2}{1}\times\frac{5}{22}\)
=\(\frac{10}{22}\)
=\(\frac{5}{11}\)
~HT~

\(\frac{25}{7}\times\frac{49}{22}\div\frac{25}{2}\)

\(=\frac{25}{7}\times\frac{49}{22}\times\frac{2}{25}\)

\(=\frac{25\times49\times2}{7\times22\times25}\)

\(=\frac{25\times7\times7\times2}{7\times2\times11\times25}\)

\(=\frac{7}{11}\)

\(\frac{25}{7}\times\frac{49}{22}:\frac{25}{2}\)
=\(\frac{25}{7}\times\frac{49}{22}\times\frac{2}{25}\)
=\(\frac{25\times49\times2}{7\times22\times25}\)
=\(\frac{25\times7\times7\times2}{7\times2\times11\times25}\)
=\(\frac{7}{11}\)
~HT~