问题
解答题
计算: (1)-
(2)-6÷[(-
(3)(
(4)-14÷(-5)2×(-
|
答案
(1)原式=-
+3 5
+2 7
-3 7
=-2 5
;2 7
(2)原式=-6÷[
×(-27)+2]=-6÷(-10)=4 9
;3 5
(3)原式=-40+5+4=-31;
(4)原式=-1÷25×(-
)+0.2=5 3
+1 15
=1 5
.4 15
计算: (1)-
(2)-6÷[(-
(3)(
(4)-14÷(-5)2×(-
|
(1)原式=-
+3 5
+2 7
-3 7
=-2 5
;2 7
(2)原式=-6÷[
×(-27)+2]=-6÷(-10)=4 9
;3 5
(3)原式=-40+5+4=-31;
(4)原式=-1÷25×(-
)+0.2=5 3
+1 15
=1 5
.4 15