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简介:
(1)18.3-6.32-10.68
=18.3-(6.32+10.68)
=18.3-17
=1.3
(2)58.97+7.6-42.57
=(58.97-42.57)+7.6
=16.4+7.6
=24
(3)24.25+39.33-18.33
=24.25+(29.33-18.33)
=24.25+11
=35.25
(4)18.48+26.88-12.36
=(18.48-12.36)+26.88
=6.12+26.88
=33
(5)39.72-15.56-12.44
=39.72-(15.56+12.44)
=39.72-28
=11.72
(6)11.91+9.91-6.91
=11.91+(9.91-6.91)
=11.91+3
=14.91
(7)85.37+56.36-76.37
=(85.37-76.37)+56.36
=9+56.36
=65.36