Question

Tính hợp lý nếu có thể

42 . ( 16 - 35 ) - 35 . ( 16 - 42 )  =?

Answer 1

\(42.\left(16-35\right)-35.\left(16-42\right)\)

\(=42.16-42.35-35.16+35.42\)

\(=42.\left(35-35\right)+16.\left(42-35\right)\)

\(=42.0+16.7\)

\(=0+112\)

\(=112\)

Answer 2

42. (16- 35) - 35. ( 16- 42)
= 42 . ( -19 )-35 . (-26 )
= -798 +910 
=112

Answer 3

$42.\left(16-35\right)-35.\left(16-42\right)$

$=42.16-42.35-35.16+35.42$

$=42.\left(35-35\right)+16.\left(42-35\right)$

$=42.0+16.7$

$=0+112$

$=112$