下列算式中的余数可能是几?

下列算式中的余数可能是几?
1.( 8) ÷7 = ( 1).......( 1)
.(9 ) ÷7 = ( 1).......(2 )
.( 10) ÷7 = (1 ).......( 3)

.( 11) ÷7 = (1 ).......( 4)
.( 12) ÷7 = ( 1).......( 5)

.( 13) ÷7 = (1 ).......( 6)
.( 15) ÷7 = ( 2).......( 1)
.(16 ) ÷7 = ( 2).......(2 )

2.( 73) ÷9 = 8......(1 )
( 74) ÷9 = 8......(2 )
(75 ) ÷9 = 8......( 3)
(76 ) ÷9 = 8......( 4)
( 77) ÷9 = 8......(5 )
( 78) ÷9 = 8......(6 )
( 79) ÷9 = 8......( 7)
( 80) ÷9 = 8......( 8)
3. ( 9) ÷8= ( 1)......(1 )
( 10) ÷8= ( 1)......( 2)
( 11) ÷8= (1 )......( 3)
( 12) ÷8= ( 1)......(4 )
( 13) ÷8= ( 1)......( 5)
( 14) ÷8= ( 1)......( 6)
( 15) ÷8= ( 1)......( 7)

4. 39 ÷4=( 9)......( 3)

余数一定要小于除数

根据余数一定要比被除数小的原则,得到
1中的余数可能是:1,2,3,4,5,6
2中的余数可能是:1,2,3,4,5,6,7,8
3中的余数可能是:1,2,3,4,5,6,7
4中的余数为确定值,即3

1.1~6
2.1~8
3.1~7
4.3
余数为一到比它小一