a) -2008.57 + 1004.(-86)
= -2.1004.57 + 1004.(-86)
= 1004.(-114) + 1004.(-86)
= 1004.(-114 - 86)
= 1004.(-200)
= -200800.
b) 32.74 + 16.(-48)
= 2.16.74 + 16.(-48)
= 148.16 + 16.(-48)
= 16.(148 - 48)
= 16.100
= 1600.
-2008,57 + 1004.(-86)
=1004.(-2).57 + 1004.(-86)
=1004.[(-2).57 + (-86)]
=1004.(-200)
=-200800
32.74 + 16.(-48)
=16.148 + 16.(-48)
=16.[148 + (-48)]
=16.100
=1600