Question

Answer 1

4

2/5

Answer 2

1)4

Answer 3

a) (3/5+2/5) x 4=5/5 x 4 = 1 x 4= 4

b) 3x1x5/3x2x5 = 1/2

Answer 4

4

2/5

Answer 5

a/ 4

b/ 2/5

Answer 6

a) (3/5+2/5) x 4

=5/5 x 4

= 1 x 4

= 4

b) \(\dfrac{12x7x15}{9x4x20}\)

= 1/2

Answer 7

a) (\(\dfrac{3}{5}\)+\(\dfrac{2}{5}\)) x 4 = \(\dfrac{5}{5}\) x 4 = 1 x 4 = 4

b) \(\dfrac{3\times1\times5}{3\times2\times5}=\dfrac{1}{2}\)  

Answer 8

a) (3/5 + 2/5) x 4 = 5/5 x 4 = 1 x 4 = 4

b) 3 x 1 x 5/3 x 2 x 5 = 1/2

Answer 9

A.4

B.chịu