Question

Answer 1

C1:

`(2/5 +1/2) xx1/4 = (4/10 + 5/10) xx 1/4 = 9/10 xx 1/4 = 9/40`

C2:

`(2/5 +1/2) xx 1/4= 2/5 xx 1/4 +1/2 xx 1/4 = 1/10 + 1/8 = 9/40`

Answer 2

C1:

A = (2/5 +1/2) x 1/4

= (4/10 + 5/10)  x 1/4

= 9/10  x 1/4

= 9/40

C2:

A= 2/5 x 1/4 + 1/2 x 1/4

= 2/20 + 1/8

=4/40 + 5/40

=9/40

Answer 3

Giải :

Cách 1:

(2/5 + 1/2) .1/4

= 9/10 . 1/4

= 9/40

Cách 2:

(2/5+1/2).1/4

= 2/5 . 1/4 + 1/2 . 1/4 

= 1/10 + 1/8

= 9/40

* Dấu chấm là dấu nhân nha *

Answer 4

I need a 40 coin, please give me more coin