题目内容
计算:
(1)
;
(2)(﹣3)2+(﹣2)3×(﹣
)÷(﹣
);
(3)(﹣1)5×[4
÷(﹣4)+(﹣
)×(﹣0.4)]÷(﹣
);
(4)﹣14﹣(1﹣0.5)×
×[2﹣(﹣3)2];
(5)(﹣
+
)×24﹣3.95×6﹣1.45×6;
(6)26﹣(﹣5)×(﹣7).
(1)
(2)(﹣3)2+(﹣2)3×(﹣
(3)(﹣1)5×[4
(4)﹣14﹣(1﹣0.5)×
(5)(﹣
(6)26﹣(﹣5)×(﹣7).
解:(1)
=3
=9+2
=11;
(2)(﹣3)2+(﹣2)3×(﹣
)÷(﹣
)
=9+(﹣8)×(﹣
)×(﹣2)
=9﹣4
=5;
(3)(﹣1)5×[4
÷(﹣4)+(﹣
)×(﹣0.4)]÷(﹣
)
=﹣1×(﹣
)×(﹣3)
=﹣(﹣
)×(﹣3)
=﹣
;
(4)﹣14﹣(1﹣0.5)×
×[2﹣(﹣3)2]
=﹣1﹣
=﹣1+
=
;
(5)(﹣
+
)×24﹣3.95×6﹣1.45×6
=﹣16+20﹣6×(3.95+1.45)
=4﹣6×5.4
=4﹣32.4
=﹣28.4;
(6)26﹣(﹣5)×(﹣7)
=26﹣35
=﹣9.
=3
=9+2
=11;
(2)(﹣3)2+(﹣2)3×(﹣
=9+(﹣8)×(﹣
=9﹣4
=5;
(3)(﹣1)5×[4
=﹣1×(﹣
=﹣(﹣
=﹣
(4)﹣14﹣(1﹣0.5)×
=﹣1﹣
=﹣1+
=
(5)(﹣
=﹣16+20﹣6×(3.95+1.45)
=4﹣6×5.4
=4﹣32.4
=﹣28.4;
(6)26﹣(﹣5)×(﹣7)
=26﹣35
=﹣9.
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