递等式计算(能简算的要简算)(8.5-4)×(0.32÷1.6) 90.7×99+90.7 7 15 ×9-6÷

2024-12-29 23:09:24
推荐回答(1个)
回答1:

(1)(8.5-4)×(0.32÷1.6)
=4.5×0.2,
=0.9;
(2)90.7×99+90.7
=(99+1)×90.7,
=100×90.7,
=9070;
(3)
7
15
×9-6÷
15
7

=
7
15
×9-6×
7
15

=(9-6)×
7
15

=3×
7
15

=
7
5

(4)
13
18
÷(
5
6
+
2
3
×
3
8

=
13
18
÷(
5
6
+
1
4
),
=
13
18
÷(
10
12
+
3
12
),
=
13
18
×
12
13

=
2
3