问题
解答题
计算: (1)-1-1÷32×
(2)(-3)×(-2)2-(-1)99÷
(3)(-10)2-5×(-3×2)2+23×10. |
答案
(1)-1-1÷32×
+21 32
=-1-1×
×1 9
+21 9
=-1-
+21 81
=-81+1-162 81
=
;80 81
(2)(-3)×(-2)2-(-1)99÷1 2
=(-3)×4-(-1)×2
=-12-(-2)
=-12+2
=-10;
(3)(-10)2-5×(-3×2)2+23×10
=100-5×(-6)2+8×10
=100-5×36+80
=100-180+80
=0.