题目内容

脱式计算(能简算的要简算)
①l+O.64÷0.8-0.15

2
11
×[
3
4
-(
7
16
-
3
8
)]
2
5
×18+32×
2
5
1
5
÷[(
2
3
+
1
5
)×
1
13
].
①l+O.64÷0.8-0.15,
=1+0.8-0.15,
=1.8-0.15,
=1.65;

2
11
×[
3
4
-(
7
16
-
3
8
)],
=
2
11
×[
3
4
-
1
16
],
=
2
11
×
11
16

=
1
8


2
5
×18+32×
2
5

=
2
5
×(18+32),
=
2
5
×50,
=20;

1
5
÷[(
2
3
+
1
5
)×
1
13
],
=
1
5
÷[
13
15
×
1
13
],
=
1
5
×15,
=3.
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