问题
解答题
计算(1)(-
(2)(-6)÷(-0.25)×
(3)-2+(1-0.2÷
(4)-14-
|
答案
(1)(-
)-(-31 2
)+(+21 4
)-(+53 4
)1 2
=(-
)+31 2
+21 4
+(-53 4
)1 2
=[(-
)+(-51 2
)]+(31 2
+21 4
)3 4
=(-6)+6
=0;
(2)(-6)÷(-0.25)×11 24
=(-6)×(-4)×11 24
=24×11 24
=11;
(3)-2+(1-0.2÷
)×(-3)3 5
=-2+(1-
×1 5
)×(-3)5 3
=-2+
×(-3)2 3
=-2+(-2)
=-4;
(4)-14-
×[2-(-3)2]1 6
=-1-
×[2+(-9)]1 6
=-1-
×(-7)1 6
=-1+7 6
=
.1 6