Question

Answer 1

Bài 1: 

a: =80x5/8=50

b: \(=\dfrac{1}{2}-\dfrac{3}{4}\cdot\dfrac{8}{9}+1=\dfrac{1}{2}-\dfrac{2}{3}+1=\dfrac{3}{6}-\dfrac{4}{6}+\dfrac{6}{6}=\dfrac{5}{6}\)

c: \(=3.8\left(11.12-1.12\right)=3.8\cdot10=38\)

Answer 2

Bài 1: 

a: =80x5/8=50

b: 

Answer 3

bài 1: 

\(a,\dfrac{5}{8}c\text{ủa}80l\text{à}:\dfrac{80\times5}{8}=50\\ b,\dfrac{1}{2}-\dfrac{3}{4}:\dfrac{9}{8}+1\\ =\dfrac{1}{2}-\dfrac{2}{3}+1\\ =\dfrac{-1}{6}+1=1\dfrac{-1}{6}\\ c,3,8\left(11,12-1,12\right)\\ =3,8\cdot10=38\)

Answer 4

a = 50

b = 38

Answer 5

a = 50

b = 38