Question

1) 58× 75+ 58× 50 -58 × 25

2) 2và 3/5 - 3/5 × ( 5/8- 7/12)

3) 1/3 - 5/4 × 4/15

 

Answer 1

1) 58× 75+ 58× 50 -58 × 25

= 58( 75 + 50 - 25 )

= 58 . 100

= 5800

Answer 2

1/ 58 x 75 + 58 x 50 - 58 x 25

= 58 x ( 75 + 50 - 25 )

= 58 x 100

= 5800

2/= \(2\frac{3}{5}-\frac{3}{5}\cdot\frac{11}{84}\)

\(=\frac{13}{5}-\frac{3}{5}\cdot\frac{11}{84}\)

\(=\frac{13}{5}-\frac{11}{140}\)

\(=\frac{364-11}{140}\)

\(=\frac{353}{140}\)

Answer 3

3/  \(\frac{1}{3}-\frac{5}{4}\cdot\frac{4}{15}\)

\(=\frac{1}{3}-\frac{1}{3}\)

\(=0\)