计算:(1)23-17-(-7)+(-16)(2)23+(-15)-1+13(3)(-26.54)+(-6.4)-18.54+6.4(4)(-478)
计算:(1)23-17-(-7)+(-16)(2)23+(-15)-1+13(3)(-26.54)+(-6.4)-18.54+6.4(4)(-478)-(-512)+(-...
计算:(1)23-17-(-7)+(-16)(2)23+(-15)-1+13(3)(-26.54)+(-6.4)-18.54+6.4(4)(-478)-(-512)+(-414)-318(5)0+1-[(-1)-(-37)-(+5)-(-47)]+|-4|
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(1)原式=23-17+7-16,
=23+7-17-16,
=-3.
(2)原式=(
+
-1)+(-
),
=-
.
(3)原式=(-26.54)-18.54+[(-6.4)+6.4],
=(-26.54)-18.54,
=-45.08.
(4)原式=(-4
)+5
+(-4
)-3
,
=(-4
-4
-3
)+5
,
=-12
+5
=-6
.
(5)原式=1-[(-1)+
-5+
]+4,
=1-[(-1+
+
)-5]+4,
=10.
=23+7-17-16,
=-3.
(2)原式=(
2 |
3 |
1 |
3 |
1 |
5 |
=-
1 |
5 |
(3)原式=(-26.54)-18.54+[(-6.4)+6.4],
=(-26.54)-18.54,
=-45.08.
(4)原式=(-4
7 |
8 |
1 |
2 |
1 |
4 |
1 |
8 |
=(-4
7 |
8 |
1 |
4 |
1 |
8 |
1 |
2 |
=-12
1 |
4 |
1 |
2 |
3 |
4 |
(5)原式=1-[(-1)+
3 |
7 |
4 |
7 |
=1-[(-1+
3 |
7 |
4 |
7 |
=10.
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