508×7=3556;
5 0 8
×
7
3 5 5 6
642÷3=214;
2 1 4
3
6 4 2
6 4
3 1 2
1 2 0
756÷5=151…1.
1 5 1
5
7 5 6
5 2 5
2 5 6
5 1