Question

Answer 1

Câu 2:

a: \(=\dfrac{20}{35}+\dfrac{63}{35}=\dfrac{83}{35}\)

b: \(=\dfrac{12}{20}-\dfrac{2}{20}=\dfrac{10}{20}=\dfrac{1}{2}\)

c: \(=\dfrac{8}{7}\cdot\dfrac{6}{5}=\dfrac{48}{35}\)

d: \(=\dfrac{1}{2}\cdot7=\dfrac{7}{2}\)

Answer 2

Bài 1:
A.51585
B.1714104
C.0.03125
D.27697

Answer 3

Bài 1:a)90861-3276=51585
         b)81624.21=1714104
         c)987662:32=308644375
         d)7826+19871=27697
Bài 2:a)\(\dfrac{83}{35}\)
b)\(\dfrac{1}{2}\)
c)\(\dfrac{48}{35}\)
d)\(\dfrac{7}{2}\)