答案
解:(1)原式=-5+10-2+7=17-7=10;
(2)原式=-5.3-3.2+2.6+3.7=-8.5+6.3=-2.2;
(3)原式=-1-
×(2-9)=-1+
=
;
(4)原式=18+32÷(-8)-16×5=18-4-80=-66.
解:(1)原式=-5+10-2+7=17-7=10;
(2)原式=-5.3-3.2+2.6+3.7=-8.5+6.3=-2.2;
(3)原式=-1-
×(2-9)=-1+
=
;
(4)原式=18+32÷(-8)-16×5=18-4-80=-66.