问题 解答题
脱式计算
(1)1655-45×140÷18=(2)0.63+37%÷(2
2
3
+1
4
9
)
=
(3)
4
9
×[
3
4
-(
7
16
-
1
4
)]
=
答案

(1)1655-45×140÷18,

=1655-6300÷18,

=1655-350,

=1305;

(2)0.63+37%÷(2

2
3
+1
4
9
),

=0.63+37%÷

37
9

=0.63+

9
100

=0.72;

(3)

4
9
×[
3
4
-(
7
16
-
1
4
)],

=

4
9
×[
3
4
-
3
16
],

=

4
9
×
9
16

=

1
4

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