6-2
3
5 =2.4; 18
9
13 ÷9=2
1
13 ; 5.6×
4
7 =3.2;
1
3 +
1
6 =
1
2 ; 8÷
4
7 =14;
4
5 ÷0.8=1; 3.6-1
3
5 =2;
4
5 ×
5
8 =
1
2 ; 3.14×4=12.56;
1
4 +
1
5 =
9
20 ;
1
4 +2
1
2 =2.75; 0.45÷
9
10 =0.5; 55÷
11
15 =75; 8÷
1
8 =64; 10-9.45=0.55;
3
2
7 +4
5
7 =8; 0.36×100=36; 0.5÷100=0.005; 1
1
2 ×
2
3 =1;
2
3 ÷7=
2
21 .