55 ÷
11
10 =50,
1
6 +
3
8 =
13
24 , 1-
2
9 +
7
9 =
14
9 ,
(
1
7 +
1
9 )×63=16,
3
4 ×
5
6 =
5
8 , 0.4 2-0.3 2=0.07,
5.47-1.8-3.2=0.47, 0.25×8.5×4=8.5.
55 ÷
11
10 =50,
1
6 +
3
8 =
13
24 , 1-
2
9 +
7
9 =
14
9 ,
(
1
7 +
1
9 )×63=16,
3
4 ×
5
6 =
5
8 , 0.4 2-0.3 2=0.07,
5.47-1.8-3.2=0.47, 0.25×8.5×4=8.5.