问题
解答题
计算: (1)-22+3×(-1)2010-|-4|×5; (2)-3-[-5+(1-2×
(3)-52×
(4)4
|
答案
(1)-22+3×(-1)2010-|-4|×5
=-4+3×1-4×5
=-4+3-20
=-21;
(2)-3-[-5+(1-2×
)÷(-2)]3 5
=-3-[-5+(1-
)÷(-2)]6 5
=-3-[-5+(-
)÷(-2)]1 5
=-3-[-5+
]1 10
=-3+49 10
=1
;9 10
(3)-52×
+25×3 4
-25×1 2 1 4
=-25×
+25×3 4
-25×1 2 1 4
=25×(-
+3 4
-1 2
)1 4
=25×(-
)1 2
=-12.5;
(4)4
+22 3
-0.8+21 5
-(-64 5
)1 3
=(4
+62 3
)+(21 3
+21 5
)-0.84 5
=11+5-0.8
=15.2.