题目内容
计算:
(1)1﹣
+
﹣
+
;
(2)
;
(3)
;
(4)
.
(1)1﹣
(2)
(3)
(4)
解:(1)1﹣
+
﹣
+
=1﹣1+2
=2;
(2)
=27÷0.027+
×(﹣27)×(﹣1)
=1000+3
=1003;
(3)
=﹣
+
48﹣
×48+
×48
=﹣44+56﹣36+26
=2;
(4)
=
×0+0.2
=0.2.
=1﹣1+2
=2;
(2)
=27÷0.027+
=1000+3
=1003;
(3)
=﹣
=﹣44+56﹣36+26
=2;
(4)
=
=0.2.
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