计算下面各题,能简便的简便算.15÷ 5 9 + 1 6 ×8 8 9 × 3

计算下面各题,能简便的简便算.15÷ 5 9 + 1 6 ×8 8 9 × 3 4 ÷ 8 15 8 17 ÷23+ 1 23 × 9 17 2 7 × 8 9 + 5 7 × 8 9 .

(1)15÷
5
9
+
1
6
×8
=27+
4
3

=28
1
3


(2)
8
9
×
3
4
÷
8
15

=
2
3
÷
8
15

=1
1
4


(3)
8
17
÷23+
1
23
×
9
17

=
1
23
×(
8
17
+
9
17

=
1
23
×1
=
1
23


(4)
2
7
×
8
9
+
5
7
×
8
9

=(
2
7
+
5
7
)×
8
9

=1×
8
9

=
8
9
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