题目内容

脱式计算,其中①-③小题要简算.
24
17
-
5
24
-
19
24
3
8
×
2
5
+
3
5
÷8×3
③40×(2-
5
8
-
2
5
-
3
4
④(
7
6
-
5
9
)÷
11
8
8
9
÷[(
2
5
+
1
10
)×
4
3
]
⑥[
5
6
-(
5
12
+
3
8
)]÷
3
4
(1)
24
17
-
5
24
-
19
24

=
24
17
-(
5
24
+
19
24
),
=
24
17
-1,
=
7
17


(2)
3
8
×
2
5
+
3
5
÷8×3,
=
3
8
×
2
5
+
3
5
),
=
3
8
×
1,
=
3
8


(3)40×(2-
5
8
-
2
5
-
3
4
),
=40×2-40×
5
8
-40×
2
5
-40×
3
4

=80-25-16-30,
=55-16-30,
=39-30,
=9;

(4)(
7
6
-
5
9
)÷
11
8

=
11
18
÷
11
8

=
4
9


(5)
8
9
÷[(
2
5
+
1
10
)×
4
3
],
=
8
9
÷
[
1
2
×
4
3
],
=
8
9
÷
2
3

=1
1
3


(6)[
5
6
-(
5
12
+
3
8
)]÷
3
4

=[
5
6
-
1
24
]÷
3
4

=
19
24
÷
3
4

=1
1
18
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