Question

1.p/s nào dưới đấy lớn hơn 1?

A.12/8                                  B.2/2

C.3/4                                    D.4/7

2.a/(6/11+5/11)x3/7

b/2/7:2/3-2/7

Answer 1

`A` 

vì `12/8` có tử lớn hơn mẫu 

Answer 2

1A

2 

a =11/11 x3/7=1 x 3/7=3/7

b = 2/7 x 3/2 -2/7=3/7-2/7=1/7

Answer 3

1/a

2.a/(6/11+5/11)x3/7

=1x3/7=3/7

b/2/7:2/3-2/7

=2/7x3/2-2/7

=3/7-2/7

=1/7

Answer 4

1,

A

2,

\(a,\left(\dfrac{6}{11}+\dfrac{5}{11}\right)\times\dfrac{3}{7}=1\times\dfrac{3}{7}=\dfrac{3}{7}\)

\(b,\dfrac{2}{7}:\dfrac{2}{3}-\dfrac{2}{7}=\dfrac{2}{7}\times\dfrac{3}{2}-\dfrac{2}{7}=\dfrac{3}{7}-\dfrac{2}{7}=\dfrac{1}{7}\)

Answer 5

`2.` 

\(a,\left(\dfrac{6}{11}+\dfrac{5}{11}\right)\times\dfrac{3}{7}=1\times\dfrac{3}{7}=\dfrac{3}{7}\\ b,\dfrac{2}{7}:\dfrac{2}{3}-\dfrac{2}{7}=\dfrac{3}{7}-\dfrac{2}{7}=\dfrac{1}{7}\)

Answer 6

`1`)

`A ` `12/8`

`2`)

` (6/11+5/11)xx3/7`

` = 11/11 xx 3/7`

` = 1 xx 3/7`

` = 3/7`

 

`2/7:2/3-2/7`

` = 2/7 xx 3/2 - 2/7`

` = 3/7 - 2/7`

` = 1/7`