问题 解答题
计算下面各题.
(
3
4
-
1
2
+
1
6
)×12
0.24×5+0.96÷1.2
1
4
-
1
5
)÷
1
4
+
4
5
17
18
×
9
10
+
17
18
÷10.
答案

(1)(

3
4
-
1
2
+
1
6
)×12,

=

3
4
×12-
1
2
×12+
1
6
×12,

=9-6+2,

=3+2,

=5;

(2)0.24×5+0.96÷1.2,

=1.2+0.8,

=2;

(3)(

1
4
-
1
5
)÷
1
4
+
4
5

=(

1
4
-
1
5
)×4+
4
5

=

1
4
×4-
1
5
×4+
4
5

=1-

4
5
+
4
5

=1;

(4)

17
18
×
9
10
+
17
18
÷10,

=

17
18
×
9
10
+
17
18
×
1
10

=

17
18
×(
9
10
+
1
10
),

=

17
18
×1,

=

17
18

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