问题
解答题
计算: (1)(-3.75)+2.85+(-1
(2)0.47-4
(3)(-17)+23+(-53)+(+36) (4)8+(-
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答案
(1)原式=-3.75+2.85-1.25+3.15
=-3.75-1.25+2.85+3.15
=-5+6
=1;
(2)原式=0.47+1.53-4
-15 6 1 6
=2-6
=-4;
(3)原式=-17+23-53+36=-17-53+23+36
=-70+79
=9;
(4)原式=8-0.25-5+0.25
=8-5
=3.