计算:(1)(-12)-5+(-14)-(-39)(2)22.54+(-4.4)+(-12.54)+4.4(3)15-[1-(-20-4)](4)(?
计算:(1)(-12)-5+(-14)-(-39)(2)22.54+(-4.4)+(-12.54)+4.4(3)15-[1-(-20-4)](4)(?79+56?34)×...
计算:(1)(-12)-5+(-14)-(-39)(2)22.54+(-4.4)+(-12.54)+4.4(3)15-[1-(-20-4)](4)(?79+56?34)×(?36);(5)?358+3112?198?2512(6)(145?56+710?815)÷(?130)(7)-23-3×(-2)3-(-1)4.
展开
展开全部
解;(1)(-12)-5+(-14)-(-39)
=-12-5-14+39
=8;
(2)22.54+(-4.4)+(-12.54)+4.4
=22.54+(-12.54)+(-4.4)+4.4
=10;
(3)15-[1-(-20-4)]
=15-[1-(-24)]
=15-25
=-10;
(4)(?
+
?
)×(?36)
=-
×(-36)+
×(-36)-
×(-36)
=28-30+27
=25;
(5)?3
+3
?
?
=-3
-
+3
-
=-6+1
=-5;
(6)(1
?
+
?
)÷(?
)
=(1
?
+
?
)×(?30)
=
×(-30)?
×(-30)+
×(-30)?
×(-30)
=-54+25-21+16
=-34;
(7)-23-3×(-2)3-(-1)4.
=-8-3×(-8)-1
=-8+24-1
=15.
=-12-5-14+39
=8;
(2)22.54+(-4.4)+(-12.54)+4.4
=22.54+(-12.54)+(-4.4)+4.4
=10;
(3)15-[1-(-20-4)]
=15-[1-(-24)]
=15-25
=-10;
(4)(?
7 |
9 |
5 |
6 |
3 |
4 |
=-
7 |
9 |
5 |
6 |
3 |
4 |
=28-30+27
=25;
(5)?3
5 |
8 |
1 |
12 |
19 |
8 |
25 |
12 |
=-3
5 |
8 |
19 |
8 |
1 |
12 |
25 |
12 |
=-6+1
=-5;
(6)(1
4 |
5 |
5 |
6 |
7 |
10 |
8 |
15 |
1 |
30 |
=(1
4 |
5 |
5 |
6 |
7 |
10 |
8 |
15 |
=
9 |
5 |
5 |
6 |
7 |
10 |
8 |
15 |
=-54+25-21+16
=-34;
(7)-23-3×(-2)3-(-1)4.
=-8-3×(-8)-1
=-8+24-1
=15.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询