1 ) 2010 + 8 - 2010 - 22
= ( 2010 - 2010 ) + 8 - 22
= 0 + 8 - 22
= - ( 22 - 8 )
= - 14
2 ) -( - 98 ) - 99 + 12 + 99
= 98 - 99 + 12 + 99
= [ ( - 99 ) + 99 ] + ( 98 + 12 )
= 0 + 110
= 110
3 ) 1 - ( - 123 ) + 7 - 8 + ( - 123 )
= 1 + 123 + 7 - 8 - 123
= [ 123 + ( - 123 ) ] + 1 + 7 - 8
= 0 + 1 + 7 -8
= 8 - 8
= 0
4 ) 72 - 24 - 37 + 24 + 37
= 72 - ( - 24 + 24 ) - ( - 37 + 37 )
= 72 - 0 - 0
= 72
5 ) - 90 - ( - 24 + 10 )+ 100
= - 90 + 24 - 10 + 100
= ( - 90 - 10 ) + 100 + 24
= - 100 + 100 + 24
= 0 + 24
= 24
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