Question

Tính nhanh

 

a, 54 x 113 + 45 x 113 + 113

 

b, 3 x 7/10 + 7/10 x 5 + 2 x 14/20

Answer 1

a,

= 113 x (54 + 45 + 1)

= 113 x 100

= 11300

b,

= 7/10 x (3 + 5 + 2)

= 7/10 x 10

= 7

Answer 2

11300

7

Answer 3

a, 54 x 113 + 45 x 113 + 113

= 113 x ( 54+45+1)

= 113 x 100

= 11300

 

b, 3 x 7/10 + 7/10 x 5 + 2 x 14/20

= 7/10 + ( 3+5+2)

= 7/10 x 10

= 7

Answer 4

11300

7

Answer 5

a. 54 x 113 + 45 x 113 + 113

= 54 x 113 + 45 x 113 + 113 x 1

= 113 x ( 54+ 45 + 1 )

= 113 x 100

= 11300

b. 3 x 7/10 + 7/10 x 5 + 2 x 14/20

= 7/10 x (3 + 5 + 2)

= 7/10 x 10

= 7