递等式计算.(能简便计算的要简便计算) 826-765÷15 &nbsp...

2025-04-06 06:39:43
推荐回答(1个)
回答1:

826-765÷15,
=826-51,
=775;

(2)7.2×99+7.2,
=7.2×(99+1),
=720;

(3)
3
4
÷[(
3
5
-
1
4
)×
3
7
],
=
3
4
÷[
7
20
×
3
7
],
=
3
4
×
20
3

=5;

(4)6.13-
2
3
-
1
3
+0.87,
=6.13+0.87-(
2
3
+
1
3
),
=7-1,
=6;

(5)36×(
3
4
-
1
6
+
2
9
),
=36×
3
4
-36×
1
6
+36×
2
9

=27-6+8,
=29;