问题 解答题
简算:
5
12
÷9+
1
9
×
7
12

②18.76-3.47-0.53;
③36×99.
答案

5
12
÷9+
1
9
×
7
12

=

5
12
×
1
9
+
1
9
×
7
12

=(

5
12
+
7
12
)×
1
9

=1×

1
9

=

1
9

②18.76-3.47-0.53

=18.76-(3.47+0.53),

=18.76-4,

=14.76;

③36×99

=36×(100-1),

=36×100-36,

=3600-36,

=3564.

判断题
单项选择题