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幼苗
共回答了15个问题采纳率:93.3% 举报
(1)
2
3 +
1
4 ÷
3
4 +
1
4 ,
=
3
4 +
1
3 +
1
4 ,
=1
1
4 ;
(2) 15÷
1
15 ×
1
15 ,
=15×15×
1
15 ,
=15;
(3) 0.125÷
1
8 ÷
7
9 ,
=
1
8 × 8×
9
7 ,
=1
2
7 ;
(4) 0÷
8
9 ÷
1
18 =0;
(5) 0.68+
2
3 +0.32 ,
=(0.68+0.32) +
2
3 ,
=1 +
2
3 ,
=1
2
3 ;
(6)
2
5 ×5÷
2
5 ×5 ,
=
2
5 ×5×
5
2 ×5 ,
=25;
(7)
5
7 ×10+10×
2
7 ,
=(
5
7 +
2
7 )×10,
=1×10,
=10;
(8)0.3 3
=0.3×0.3×0.3,
=0.027;
(9)1÷7×24,
=
1
7 ×24 ,
=3
3
7 ;
(10)5-1.4-1.6,
=5-(1.4+1.6),
=5-3,
=2.
1年前
6