问题 解答题
用合适的方法计算.
①35×12+350÷70
②54.2-
2
9
+4.8-
16
9

③0.7÷[(
5
6
-
1
4
)×24].
答案

①35×12+350÷70,

=420+5,

=425;

②54.2-

2
9
+4.8-
16
9

=(54.2+4.8)-(

2
9
+
16
9
),

=59-2,

=57;

③0.7÷[(

5
6
-
1
4
)×24],

=0.7÷[

5
6
×24-
1
4
×24],

=0.7÷(20-6),

=0.7÷14,

=0.05.

单项选择题
单项选择题