题目内容

下面各题,能简算的一定要简算
1
15
×1.2+
1
15
×1.8
13
6
+
1
3
-
11
12
)×12
36÷[
5
6
+(
5
8
-
1
3
)]
0.5+…+0.5
100
)×1.25.
(1)
1
15
×1.2+
1
15
×1.8,
=
1
15
×(1.2+1.8),
=
1
15
×3,
=
1
5


(2)(
13
6
+
1
3
-
11
12
)×12
=(
13
6
+
1
3
-
11
12
)×12,
=
13
6
×12+
1
3
×12-
11
12
×12,
=26+4-11,
=19;

(3)36÷[
5
6
+(
5
8
-
1
3
)],
=36÷[
20
24
+(
15
24
-
8
24
)],
=36÷[
20
24
+
7
24
],
=36÷
27
24

=36×
24
27

=32;

(4)(
0.5+…+0.5
100
)×1.25
=0.5×100×1.25,
=50×1.25,
=62.5;
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