题目内容

脱式计算(能简算的要简算)
70.9-48.32÷1.6
1
9
-
1
12
)×36
4
25
÷[(
2
5
+
1
3
)×
9
11
]
4
7
×23+16×
1
7
+
1
7
×60.

(1)70.9-48.32÷1.6,
=70.9-30.2,
=40.7;

(2)(
1
9
-
1
12
)×36,
=
1
9
×36-
1
12
×36,
=4-3,
=1;

(3)
4
25
÷[(
2
5
+
1
3
)×
9
11
],
=
4
25
÷[
11
15
×
9
11
],
=
4
25
÷
3
5

=
4
15


(4)
4
7
×23+16×
1
7
+
1
7
×60,
=
1
7
×92+16×
1
7
+
1
7
×60,
=
1
7
×(92+16+60),
=
1
7
×168,
=24.
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