7.8:23.4=
1
3 1÷
3
8 -
3
8 ÷1=
55
24 , 0.1875:0.25=
3
4
4
25 ×99+
4
25 =16,
3.14×2.5 2=19.625, 6+6÷
2
5 =21, 25分:
1
4 时=
5
3 ,
3
4 ×
5
7 ÷
3
4 ×
5
7 =
25
49 .
7.8:23.4=
1
3 1÷
3
8 -
3
8 ÷1=
55
24 , 0.1875:0.25=
3
4
4
25 ×99+
4
25 =16,
3.14×2.5 2=19.625, 6+6÷
2
5 =21, 25分:
1
4 时=
5
3 ,
3
4 ×
5
7 ÷
3
4 ×
5
7 =
25
49 .