问题
解答题
计算下列各式: (1)(-3)2÷2
(2)-0.25÷(-
|
答案
(1)9×
×(-4 9
)+4+4×(-3 2
),3 2
=-6+4-6,
=-12+4,
=-8;
(2)-0.25÷(-
)2×(-1)3+(1 2
+11 8
-3.75)×24,7 3
=-
×4×(-1)+1 4
×24+11 8
×24-7 3
×24,15 4
=1+33+56-90,
=90-90,
=0.