75×6=450;
7 5
×
6
4 5 0
705×8=5640;
7 0 5
×
8
5 6 4 0
482×4=1928;
4 8 2
×
4
1 9 2 8
456÷3=92;
9 2
3
4 5 6
4 5 6
6 0
305÷5=61;
6 1
5
3 0 5
3 0 5
5 0
720÷3=240.
2 4 0
3
7 2 0
6 1 2
1 2 0