计算下面的题,能简算的要用简便方法计算哟,并写出简算步骤.
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①2.35-81÷27×0.45,
=2.35-3×0.45,
=2.35-1.35,
=1;
②125×
5
3 ×0.8×
3
10 ,
=(125×0.8)×(
5
3 ×
3
10 ),
=100×
1
2 ,
=50;
③3×(
2
15 +
1
12 )-
2
5 ,
=3×
13
60 -
2
5 ,
=
13
20 -
2
5 ,
=
1
4 ;
④[1-(
1
4 +
3
8 )]÷
1
4 ,
=[1-
5
8 ]×4,
=
3
8 ×4,
=
3
2 .
=2.35-3×0.45,
=2.35-1.35,
=1;
②125×
5
3 ×0.8×
3
10 ,
=(125×0.8)×(
5
3 ×
3
10 ),
=100×
1
2 ,
=50;
③3×(
2
15 +
1
12 )-
2
5 ,
=3×
13
60 -
2
5 ,
=
13
20 -
2
5 ,
=
1
4 ;
④[1-(
1
4 +
3
8 )]÷
1
4 ,
=[1-
5
8 ]×4,
=
3
8 ×4,
=
3
2 .
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