下面的题怎样简便怎样算:①( 1 8 - 1 4 ÷4× 1 4 )÷ 1 2 ② 23 24 ×23 ③38 3 4

下面的题怎样简便怎样算:

①(
1
8
-
1
4
÷4×
1
4
)÷
1
2
23
24
×23
③38
3
4
-15.38+61.25-3.62
④17.98+2.5×0.3-18÷1.5
6
7
×
3
4
+
1
4
×
6
7
⑥(
7
8
+
7
16
)÷
7
16
啵儿公主 1年前 已收到1个回答 举报

zdz12345 幼苗

共回答了9个问题采纳率:77.8% 举报

①(
1
8 -
1
4 ÷4×
1
4 )÷
1
2 ,
=(
1
8 -
1
4 ×
1
4 ×
1
4 )÷
1
2 ,
=(
1
8 -
1
64 )×2,
=
7
64 × 2,

7
32 ;


23
24 ×23,
=
23
24 × (24-1),
=
23
24 × 24 -
23
24 ,
=23 -
23
24 ,
= 22
1
24 ;

③38
3
4 -15.38+61.25-3.62,
=38.75+61.25-(15.38+3.62),
=100-19,
=81;

④17.98+2.5×0.3-18÷1.5,
=17.98+0.75-12,
=18.73-12,
=6.73;


6
7 ×
3
4 +
1
4 ×
6
7 ,
=(
3
4 +
1
4 )×
6
7 ,
=1×
6
7 ,
=
6
7 ;

⑥(
7
8 +
7
16 )÷
7
16 .
=
7
8 ×
16
7 +
7
16 ×
16
7 ,
=2+1,
=3.

1年前

8
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