\(\frac{3}{7}\)x 25 x 35 = 

\(\frac{3}{7}\)x 35 x 25 = 15 x 25= 375

Bài làm

- \(\frac{3}{5}:\frac{3}{7}=\frac{3}{5}x\frac{7}{3}=\frac{21}{15}=\frac{7}{5}\)

- \(\frac{3}{7}x\frac{8}{5}-\frac{16}{35}\)

= \(\frac{24}{35}-\frac{16}{35}\)

= \(\frac{8}{35}\)

# Chúc bạn học tốt #

\(\frac{3}{5}:\frac{3}{7}=\frac{3}{5}\times\frac{7}{3}=\frac{3\times7}{5\times3}=\frac{1\times7}{5\times1}=\frac{7}{5}\)

\(\frac{3}{7}\times\frac{8}{5}-\frac{16}{35}=\frac{3\times8}{7\times5}-\frac{16}{35}=\frac{24}{35}-\frac{16}{35}=\frac{8}{35}\)

\(\frac{3}{5}:\frac{3}{7}=\frac{7}{5}\)

\(\frac{3}{7}\)x \(\frac{8}{5}\)- \(\frac{16}{35}\)= \(\frac{24}{35}-\frac{16}{35}=\frac{8}{35}\)

A

A

A

a: =35/17-18/17-9/5+4/5

=1-1=0

b: =-7/19(3/17+8/11-1)

=7/19*18/187=126/3553

c: =26/15-11/15-17/3-6/13

=1-6/13-17/3

=7/13-17/3=-200/39

số lớn wa

5³ . 35 + 4³ . 7

= 5³ . 5 . 7 + 4³ . 7

= 5⁴ . 7 + 4³ . 7

= ( 5⁴ + 4³ ) . 7

= 689 . 7

= 4823

bài này làm kiểu này nè ! 

5 mũ 3 nhân với 35 công 4 mũ 3 nhân 7 

125 nhân với 35 rồi cộng với 64 nhân với 7

4375 cộng với 448 

4823 

\(\dfrac{7}{9}\cdot\dfrac{3}{35}=\dfrac{7}{3\cdot3}\cdot\dfrac{3}{7\cdot5}=\dfrac{1}{15}\)

\(\dfrac{9}{22}\cdot55=\dfrac{9}{11\cdot2}\cdot11\cdot5=\dfrac{45}{2}\)

\(\dfrac{11}{17}:\dfrac{33}{34}=\dfrac{11}{17}\cdot\dfrac{34}{33}=\dfrac{11\cdot17\cdot2}{17\cdot11\cdot3}=\dfrac{2}{3}\)

7/9 x 3/35 = 1/15

9/22 x 55 = 45/2

11/17 : 33/34 = 2/3

1/15     ;      45/2       ;      2/3

a)\(8-\frac{3}{5}=\frac{40}{5}-\frac{3}{5}=\frac{37}{5}\)

b)\(\frac{24}{15}\times\frac{56}{72}\times\frac{10}{14}=\frac{13440}{15120}=\frac{8}{9}\)

c)\(\frac{32}{48}\times\frac{35}{21}\times\frac{63}{14}\times\frac{9}{30}=\frac{2}{3}\times\frac{5}{3}\times\frac{9}{2}\times\frac{3}{10}=\frac{270}{180}=\frac{3}{2}\)

d)\(7-\frac{72}{48}\times\frac{56}{60}-3=7-\frac{3}{2}\times\frac{14}{15}-3\)

\(=7-\frac{7}{5}-3\)

\(=\frac{35}{5}-\frac{7}{5}-\frac{15}{5}\)

\(=\frac{13}{5}\)

#H

(Sai thì sửa)

\(\frac{5}{6}+\frac{7}{4}+\frac{11}{24}=\frac{20+42+11}{24}=\frac{73}{24}\)

\(\frac{5}{7}-\frac{2}{5}-\frac{3}{35}=\frac{25-14-3}{35}=\frac{8}{35}\)

\(\frac{4}{9}\times\frac{3}{2}\times\frac{9}{5}=\frac{4\times3\times9}{9\times2\times5}=\frac{6}{5}\)

\(\frac{21}{22}:\frac{7}{11}\times\frac{2}{3}=\frac{21}{22}\times\frac{11}{7}\times\frac{2}{3}=\frac{3}{2}\times\frac{2}{3}=1\)