`-1911-(1234-1911)`
`= -1911-1234+1911`
`=(-1911+1911)-1234`
`=0-1234`
`=-1234`
___________________
`156.72+28.156`
`=156.(72+28)`
`=156.100`
`=15600`
__________________
`32 . ( -39 ) + 16 . ( -22 )`
`= 32 . ( -39 ) + 16 . 2 . ( -11 )`
`= 32 . ( -39 ) + 32 . ( -11 `
`= 32 . [ ( -39 ) + ( -11 ) ]`
`= 32 . ( -50 )`
`= -1600`
__________________
`-1945-(567-1945)`
`=-1945-567+1945`
`=-567`
_________________
`184.33+67.184`
`=184.(33+67)`
`=184.100`
`=18400`
________________
`44 . (-36)+ 22 .( -28)`
`= 22 . 2 . (-36) + 22 .( -28 )`
`= 22 . [2 . (-36 )] + 22 . (-28)`
`= 22 .( -72) + 22 . (-28)`
`= 22 . [( -72 )+ (-28 )]`
`= 22 . -100`
`= - 2200 `
