Question

Tính nhanh:

        ( 24%+\(\frac{3}{4}\)     +0,76+25%) x ( \(3\frac{5}{7}\)      + \(1\frac{8}{28}\)          )

Answer 1

\(\left(24\%+\frac{3}{4}+0,76+25\%\right)\times\left(3\frac{5}{7}+1\frac{8}{28}\right)\)

\(=\left(\frac{6}{25}+\frac{3}{4}+0,76+\frac{1}{4}\right)\times\left(\frac{26}{7}+\frac{36}{28}\right)\)

\(=\left(\frac{6}{25}+1+0,76\right)\times\left(\frac{26}{7}+\frac{36}{28}\right)\)

\(=\left(\frac{6}{25}+1,76\right)\times\left(\frac{26}{7}+\frac{9}{7}\right)\)

\(=5\times\left(\frac{6}{25}+1,76\right)\)

= 5 x 2 

= 10

Answer 2

 =( 24% +75% + 76% +25%) x (26/7 + 36/28)

 =(24%+76%+25%+75% )   x (104/28 +36/28)

 =( 1+1) x 5

 = 2 x 5

 = 10

Answer 3

=( 24% +75% + 76% +25%) x (26/7 + 36/28)

 =(24%+76%+25%+75% )   x (104/28 +36/28)

 =( 1+1) x 5

 = 2 x 5

 = 10