题目内容

计算下列各题,能简算的要简算.
3
25
×99+
3
25
4
5
+9×
5
4
48×(
7
12
+
1
4
5
11
×
1
4
÷
5
11
×
1
4
(1)
3
25
×99+
3
25

=
3
25
×(99+1),
=
3
25
×100,
=12;

(2)7÷
4
5
+9×
5
4

=7×
5
4
+9×
5
4

=(7+9)×
5
4

=16×
5
4

=20;

(3)48×(
7
12
+
1
4
),
=48×
7
12
+48×
1
4

=28+12,
=40;

(4)
5
11
×
1
4
÷
5
11
×
1
4

=
5
11
×
1
4
×
11
5
×
1
4

=(
5
11
×
11
5
)×(
1
4
×
1
4
),
=1×
1
16

=
1
16
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