3
10 ÷
3
4 =
2
5 , 18×
7
9 =14,
1
2 +
1
4 =
3
4 ,
5
4 ×
2
7 ×
4
5 =
2
7 ,
1÷50%=2,
71
6 ×0=0,
1
3 -
1
4 =
1
12 , 6×
2
5 -
2
5 ×5=
2
5 .
3
10 ÷
3
4 =
2
5 , 18×
7
9 =14,
1
2 +
1
4 =
3
4 ,
5
4 ×
2
7 ×
4
5 =
2
7 ,
1÷50%=2,
71
6 ×0=0,
1
3 -
1
4 =
1
12 , 6×
2
5 -
2
5 ×5=
2
5 .