Question

tính bằng hai cách :

a. 7/11 : 3/5 + 4/11 : 3/5               b. < 6,24 + 1,26 > : 0,75

Answer 1

a) C1:

7/11 : 3/5 + 4/11 : 3/5 = 7/11 x 5/3 + 4/11 x 5/3

= (7/11 + 4/11) x 5/3

= 1 x 5/3

= 5/3

C2:

7/11 : 3/5 + 4/11 : 3/5 = (7/11 + 4/11) : 3/5

= 1 : 3/5

= 1 x 5/3

= 5/3

Answer 2

b) C1:

(6,24 + 1,26) : 0,75 = 7,5 : 0,75 

= 10

C2:

(6,24 + 1,26) : 0,75 = 6,24 : 0,75 + 1,26 : 0,75

= 8,32 + 1,68

= 10

Answer 3

chúc bạn may mắn

Answer 4

a) C1:

7/11 : 3/5 + 4/11 : 3/5 = 7/11 x 5/3 + 4/11 x 5/3

= (7/11 + 4/11) x 5/3

= 1 x 5/3

= 5/3

C2:

7/11 : 3/5 + 4/11 : 3/5 = (7/11 + 4/11) : 3/5

= 1 : 3/5

= 1 x 5/3

= 5/3