问题 解答题
脱式计算,能简算的要简算.
5
11
×
7
9
+
7
9
×
6
11
51×10110.25-3.75-6.25+7.75
35×12+350÷703+0.7÷[(
5
6
-
1
4
)×24]
1
3
÷
6
5
×
9
10
答案

(1)

5
11
×
7
9
+
7
9
×
6
11

=(

5
11
+
6
11
)×
7
9

=1×

7
9

=

7
9

(2)51×101,

=51×(100+1),

=51×100+51×1,

=5100+51,

=5151;

(3)10.25-3.75-6.25+7.75,

=(10.25+7.75)-(3.75+6.25),

=18-10,

=8;

(4)35×12+350÷70,

=420+5,

=425;

(5)3+0.7÷[(

5
6
-
1
4
)×24],

=3+0.7÷[

5
6
×24-
1
4
×24],

=3+0.7÷[20-6],

=3+0.7÷14,

=3+0.05,

=3.05;

(6)

1
3
÷
6
5
×
9
10

=

5
18
×
9
10

=

1
4

单项选择题
判断题