题目内容
计算:(1)1.78+3.64﹣5.25﹣0.2+0.3﹣0.33
(2)1﹣
+
+
﹣
﹣3
(3)(﹣
+
)÷(﹣
)×
+(﹣1)100
(4)﹣102﹣[(1﹣
)×
][2﹣(﹣3)2]
(5)﹣2﹣{8+(﹣1)2﹣[(﹣4)×2÷(﹣2)+
×(﹣6)]}
(6)
+|﹣(﹣
)2﹣
|÷
﹣|﹣2﹣3|﹣
(2)1﹣
(3)(﹣
(4)﹣102﹣[(1﹣
(5)﹣2﹣{8+(﹣1)2﹣[(﹣4)×2÷(﹣2)+
(6)
解:(1)原式=5.42﹣5.25﹣0.2+0.3﹣0.33,
=0.17﹣0.2+0.3﹣0.33,
=﹣0.03+0.3﹣0.33,
=0.27﹣0.33,
=﹣0.06
(2)原式=﹣
+
+1﹣3
+
﹣
,
=﹣
﹣
+
﹣
,
=
+
﹣
,
=
,
=﹣
﹣
,
=
,
=﹣
(3)原式=(﹣
)÷(﹣
)×
+(﹣1)100,
=
×
×
+1,
=1+1,
=2
(4)原式=﹣102﹣[
][2﹣32],
=﹣100﹣
×(2﹣9),
=﹣100﹣
×(﹣7),
=﹣100+
,
=﹣98
(5)原式=﹣2﹣{8+1﹣[﹣8÷(﹣2)﹣
]},
=﹣2﹣{9+1},
=﹣2﹣10,
=﹣12
(6)原式=
+|
|÷
﹣|﹣5|﹣
,
=﹣
+
×25﹣5﹣5,
=
+
﹣10,
=﹣
,
=﹣
。
=0.17﹣0.2+0.3﹣0.33,
=﹣0.03+0.3﹣0.33,
=0.27﹣0.33,
=﹣0.06
(2)原式=﹣
=﹣
=
=
=﹣
=
=﹣
(3)原式=(﹣
=
=1+1,
=2
(4)原式=﹣102﹣[
=﹣100﹣
=﹣100﹣
=﹣100+
=﹣98
(5)原式=﹣2﹣{8+1﹣[﹣8÷(﹣2)﹣
=﹣2﹣{9+1},
=﹣2﹣10,
=﹣12
(6)原式=
=﹣
=
=﹣
=﹣
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