题目内容
【题目】准确计算下面各题,能简便计算的要简便计算
(1)
+
×(
÷
)
(2)(
-
)×
÷
(3)
÷[
×(
+
)]
(4)
+
+
+
(5)
×
-
×
(6)
×1.8+19.2× ![]()
【答案】(1)![]()
(2)1
(3)![]()
(4)2
(5)![]()
(6)12
【解析】
(1)
+
×(
÷
)
=
+
×(
×
)
=
+
× ![]()
=
+
× ![]()
= ![]()
(2)(
-
)×
÷ ![]()
=
×
÷ ![]()
=
÷ ![]()
= 1
(3)
÷[
×(
+
)]
=
÷[
×
)]
=
÷ ![]()
= ![]()
(4)
+
+
+ ![]()
=(
+
)+(
+
)
=1+1
=2
(5)
×
-
× ![]()
=
×(
-
)
=
× ![]()
= ![]()
(6)
×1.8+19.2× ![]()
=
×(1.8+19.2)
=
×21
=12
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