Question

tính giá trị biểu thức :

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

b).( 5 2/3 - 4 1/3 ) : 2 1/4

đầy đủ tick. lẹ elen

Answer 1

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

= ( 3/2 + 11/4 ) x 23/5

= 17/4 x 23/5

= 391/20

b) ( 5 2/3 - 4 1/3 ) : 2 1/4

= ( 17/3 - 13/3 ) : 9/4

= 4/3 : 9/4

= 16/27

Answer 2

a. (\(\frac{11}{2}+\frac{23}{4}\)) * 43/5

= 45/4 * 43/5

= 9/4 * 43 = 387/4 = \(96\frac{3}{4}\)

b. (52/3-41/3) * 21/4

= 11/3  : 21/4

 = 11/3 * 4/21 = 44/63 

Answer 3

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

 = ( 3/2+11/4) x 23/5

= 17/4 x 23/5

=391/20

b).( 5 2/3 - 4 1/3 ) : 2 1/4

=(17/3-13/3):9/4

=4/3 : 9/4

=16/27