问题
解答题
计算: (1)(-1)100×|-5|-4×(-3)-42; (2)12×(-3-
|
答案
(1)(-1)100×|-5|-4×(-3)-42,
=1×5+12-16,
=5+12-16,
=17-16,
=1;
(2)12×(-3-
+11 4
)+(-3)2-(-2)2÷1 3
,1 4
=(-3)×12-
×12+11 4
×12-9-4×4,1 3
=-36-3+16-9-16,
=-48.