题目内容

计算下面各题,能简算的要简算.
48×(
5
6
+
5
8
-
5
12
)1.25×3.2×0.257-7×
3
7
+
4
7


35×(1-
3
7
)÷
5
12
8
17
÷19+
1
19
×
9
17
2
3
+
1
3
×
3
4
(1)48×(
5
6
+
5
8
-
5
12
),
=48×
5
6
+48×
5
8
-48×
5
12

=40+30-20,
=50;

(2)1.25×3.2×0.25,
=1.25×0.8×(4×0.25),
=1×1,
=1;

(3)7-7×
3
7
+
4
7

=7-3+
4
7

=4+
4
7

=4
4
7


(4)35×(1-
3
7
)÷
5
12

=35×
4
7
×
12
5

=48;

(5)
8
17
÷19+
1
19
×
9
17

=
8
17
1
19
+
1
19
×
9
17

=(
8
17
+
9
17
)×
1
19

=
1
19


(6)
2
3
+
1
3
×
3
4

=
2
3
+
1
4

=
11
12
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