题目内容

简算
5
9
×
7
12
+
13
9
÷
12
7

47×
5
48

0.375×(0.75+
8
3
+
1
4

5
8
×
2
17
×4.8×51.
(1)
5
9
×
7
12
+
13
9
÷
12
7

=
5
9
×
7
12
+
13
9
×
7
12

=(
5
9
+
13
9
)×
7
12

=2×
7
12

=
7
6


(2)(48-1)×
5
48

=48×
5
48
-
5
48

=5-
5
48

=4
43
48


(3)0.375×(0.75+
8
3
+
1
4

=
3
8
×(
3
4
+
1
4
+
8
3
),
=
3
8
×(1+
8
3
),
=
3
8
×
1+
3
8
×
8
3

=
3
8
+1,
=1
3
8


(4)
5
8
×
2
17
×4.8×51;
=(
5
8
×4.8)×(
2
17
×
51),
=3×6,
=18.
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