第78页

信息发布者:
41
4800
184
450
4050
960
4240
480
14259
12978
32800
=840+620
=1460
=2880÷60
=48
=15×(40-20)
=15×20
=300

3
2100
8400
900
2100
3000

=


189
2889
38889
54321×9=488889
654321×9=5888889