题目内容
计算题:(1)
=( );
(2)(+5)+(﹣7)=( );
(3)
=( );
(4)7a2b+2a2b=( );
(5)3xy2﹣7xy2=( );
(6)x﹣[3x﹣2(1+2x)]=( );
(7)﹣{﹣[﹣(2x﹣3y)]}=( ).
(8)
(9)
(10)
(11)
(12)﹣32﹣(﹣3)2+(﹣3)2×(﹣
)﹣(0.3)2÷|﹣0.9|
(13)﹣32×(﹣
)2+(
﹣
+
)×(﹣24)
(2)(+5)+(﹣7)=( );
(3)
(4)7a2b+2a2b=( );
(5)3xy2﹣7xy2=( );
(6)x﹣[3x﹣2(1+2x)]=( );
(7)﹣{﹣[﹣(2x﹣3y)]}=( ).
(8)
(9)
(10)
(11)
(12)﹣32﹣(﹣3)2+(﹣3)2×(﹣
(13)﹣32×(﹣
解:(1)
;
(2)﹣2;
(3)﹣2;
(4)9a2b;
(5)﹣4xy2;
(6)2x+2;
(7)﹣2x+3y;
(8)
=
(﹣2)÷(
×
)×
+5,
=(﹣2)×32×
+5,
=﹣400+5,
=﹣395;
(9)
,
=﹣1+
×
×(2+27),
=﹣1+
,
=
;
(10)
,
=(﹣13)×(
+
)﹣0.34×(
+
),
=﹣13﹣0.34,
=﹣13.34;
(11)
,
=0.29+[(
) 2+
]÷(﹣
)+0.71,
=0.29+9÷(﹣
)+0.71,
=1﹣
,
=﹣
;
(12)﹣32﹣(﹣3)2+(﹣3)2×(﹣
)﹣(0.3)2÷|﹣0.9|,
=﹣9﹣9+9×(﹣
)﹣0.09×
,
=﹣18﹣12﹣0.1,
=﹣30.1;
(13)﹣32×(﹣
)2+(
﹣
+
)?(﹣24),
=﹣9×
+
×(﹣24)﹣
×(﹣24)+
×(﹣24),
=﹣1﹣18+4﹣9,
=﹣24.
(2)﹣2;
(3)﹣2;
(4)9a2b;
(5)﹣4xy2;
(6)2x+2;
(7)﹣2x+3y;
(8)
(﹣2)÷(
=(﹣2)×32×
=﹣400+5,
=﹣395;
(9)
=﹣1+
=﹣1+
=
(10)
=(﹣13)×(
=﹣13﹣0.34,
=﹣13.34;
(11)
=0.29+[(
=0.29+9÷(﹣
=1﹣
=﹣
(12)﹣32﹣(﹣3)2+(﹣3)2×(﹣
=﹣9﹣9+9×(﹣
=﹣18﹣12﹣0.1,
=﹣30.1;
(13)﹣32×(﹣
=﹣9×
=﹣1﹣18+4﹣9,
=﹣24.
练习册系列答案
相关题目