能简便计算的要简便计算. 1 4 ×4÷ 1 4 ×4 8 13 ÷7+ 1 7 × 5 13 ( 7 5 × 5 14
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(1)
1
4 ×4÷
1
4 ×4,
=1 ÷
1
4 ×4,
=4×4,
=16;
(2)
8
13 ÷7+
1
7 ×
5
13 ,
=
8
13 ×
1
7 +
1
7 ×
5
13 ,
=(
8
13 +
5
13 )×
1
7 ,
=1×
1
7 ,
=
1
7 ;
(3)(
7
5 ×
5
14 +
10
3 ÷
2
3 )÷57%,
=(
1
2 +5)÷57%,
=5
1
2 ÷57%,
=
11
2 ×
100
57 ,
=
550
57 .
1
4 ×4÷
1
4 ×4,
=1 ÷
1
4 ×4,
=4×4,
=16;
(2)
8
13 ÷7+
1
7 ×
5
13 ,
=
8
13 ×
1
7 +
1
7 ×
5
13 ,
=(
8
13 +
5
13 )×
1
7 ,
=1×
1
7 ,
=
1
7 ;
(3)(
7
5 ×
5
14 +
10
3 ÷
2
3 )÷57%,
=(
1
2 +5)÷57%,
=5
1
2 ÷57%,
=
11
2 ×
100
57 ,
=
550
57 .
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