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(2013•华亭县模拟)用你喜欢的方法计算下列各题.12.06-0.5+0.5×0.27.4+0.38+0.22+2.6(23+215)×45350÷56−350×45.

题目详情
(2013•华亭县模拟)用你喜欢的方法计算下列各题.
12.06-0.5+0.5×0.2 7.4+0.38+0.22+2.6 (
2
3
+
2
15
)×45
350÷
5
6
−350×
4
5
▼优质解答
答案和解析
(1)12.06-0.5+0.5×0.2,
=12.06-0.5+0.1,
=12.02;

(2)7.4+0.38+0.22+2.6,
=(7.4+2.6)+(0.38+0.22),
=10+0.6,
=10.6;

(3)(
2
3
+
2
15
)×45,
=
2
3
×45+
2
15
×45,
=30+6,
=36;

(4)350÷
5
6
-350×
4
5

=350×
6
5
-350×
4
5

=350×(
6
5
-
4
5
),
=350×
2
5

=140.