Câu hỏi của Acc 3 nek đó bít

Question

Giúp muk với . Rõ ràng ra nhá. Ét o ét

TV Cuber · Accepted Answer

bài 1

a)$=\dfrac{16}{40}+\dfrac{15}{40}=\dfrac{31}{40}$

b)$=\dfrac{7}{6}-\dfrac{4}{6}=\dfrac{3}{6}=\dfrac{1}{2}$

c)$=\dfrac{30}{9}=\dfrac{10}{3}$

d)$=\dfrac{8}{5}\times\dfrac{7}{4}=\dfrac{14}{5}$

Câu trả lời:

bài 1

a)$=\dfrac{16}{40}+\dfrac{15}{40}=\dfrac{31}{40}$

b)$=\dfrac{7}{6}-\dfrac{4}{6}=\dfrac{3}{6}=\dfrac{1}{2}$

c)$=\dfrac{30}{9}=\dfrac{10}{3}$

d)$=\dfrac{8}{5}\times\dfrac{7}{4}=\dfrac{14}{5}$

qlamm · Answer

bài 1

a) 2/5 + 3/8 = 31/40

b) 7/6 - 2/3 = 1/2

c) 5/9 x 6 = 10/3

d) 8/5 : 4/7 = 14/5

Bài 2

a) 4/5 + x = 5/6

x = 5/6 - 4/5

x = 1/30

b) x : 7/10 = 5

x = 7/10 x 5

x = 7/2