题目内容

计算
1.5×[0.02÷(2.1-2.09)]
9
36
÷[
3
4
-(
7
16
-
1
4
)].
(1)1.5×[0.02÷(2.1-2.09)],
=1.5×[0.02÷0.01],
=1.5×2,
=3;

(2)
9
36
÷[
3
4
-(
7
16
-
1
4
)],
=
9
36
÷[
3
4
-
7
16
+
1
4
],
=
9
36
÷[1-
7
16
],
=
9
36
÷
9
16

=
4
9
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