问题
解答题
计算: (1)-20+(-14)-(-18)-13; (2)(-
(3)-1-(-5
(4)-14+[1
|
答案
(1)-20+(-14)-(-18)-13
=-20-14+18-13
=-47+18
=-29;
(2)(-
-3 4
+5 9
)÷7 12 1 36
=(-
-3 4
+5 9
)×367 12
=-
×36-3 4
×36+5 9
×367 12
=-27-20+21
=-26;
(3)-1-(-5
)×1 2
-(-8)÷|-3+1|4 11
=-1+2+8÷2
=-1+2+4
=5;
(4)-14+[1
-(1 24
+3 8
-1 6
)×24]÷53 4
=-1+[1
-9-4+18]÷51 24
=-1+6
÷51 24
=-1+15 24
=
.5 24