Question

( 1/2 + 1/4 + 1/6 + 1/8 + 1/10 ) × ( 1,25 × 0,36 - 3,75 × 0,12 )

Tính

Answer 1

\(\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{6}+\frac{1}{8}\right)\times\left(1,25\times0,36-3,75\times0,12\right)\)

\(=\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{6}+\frac{1}{8}\right)\times\left(1,25\times0,36-1,25\times3\times0,12\right)\)

\(=\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{6}+\frac{1}{8}\right)\times\left(1,25\times0,36-1,25\times0,36\right)\)

\(=\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{6}+\frac{1}{8}\right)\times0\)

\(=0\)

Answer 2

( 1/2 + 1/4 + 1/6 + 1/8 + 1/10 ) × ( 1,25 × 0,36 - 3,75 × 0,12 )

= ( 1/2 + 1/4 + 1/6 + 1/8 + 1/10 ) × 0 

(3,75 : 1,25 = 3 ; 0,36 : 0,12 = 3 )

= 0