7 - 4=
3
There are 5 birds in a tree. 3 birds flew away. How many birds are left?
2 birds
There are 10 fish in the sea. 8 fish swam away. How many fish are left?
2 fish
10 - 6=
4
9 - 4=
5
8 - 5=
3
10 - 2=
8
6 - 2=
4
10 - 1=
9
10 - 8=
2
9 - 6=
3
10 - 9=
1
10 - 3=
7
10 - 4=
6