我会算（每题0.5分,共40分）
$45÷9=$ $5÷5=$ $24÷(\ \ \ \ )=6$ $6÷(\ \ \ \ )=1$
$63÷9=$ $12÷3=$ $9÷(\ \ \ \ )=1$ $8÷(\ \ \ \ )=1$
$42÷7=$ $56÷7=$ $40÷(\ \ \ \ )=5$ $24÷(\ \ \ \ )=8$
$6÷3=$ $12÷2=$ $48÷(\ \ \ \ )=8$ $16÷(\ \ \ \ )=8$
$2÷2=$ $15÷5=$ $8÷(\ \ \ \ )=4$ $4÷(\ \ \ \ )=1$
$42÷6=$ $6÷1=$ $20÷(\ \ \ \ )=5$ $7÷(\ \ \ \ )=7$
$18÷6=$ $48÷8=$ $8÷(\ \ \ \ )=2$ $2÷(\ \ \ \ )=2$
$14÷2=$ $36÷4=$ $18÷(\ \ \ \ )=6$ $27÷(\ \ \ \ )=9$
$3÷3=$ $72÷9=$ $36÷(\ \ \ \ )=6$ $21÷(\ \ \ \ )=3$
$25÷5=$ $54÷6=$ $64÷(\ \ \ \ )=8$ $21÷(\ \ \ \ )=7$
$4÷1=$ $10÷5=$ $49÷(\ \ \ \ )=7$ $5÷(\ \ \ \ )=5$
$20÷5=$ $12÷6=$ $9÷(\ \ \ \ )=9$ $56÷(\ \ \ \ )=7$
$8÷1=$ $16÷8=$ $54÷(\ \ \ \ )=6$ $32÷(\ \ \ \ )=8$
$15÷3=$ $30÷5=$ $28÷(\ \ \ \ )=7$ $14÷(\ \ \ \ )=2$
$4÷2=$ $40÷5=$ $81÷(\ \ \ \ )=9$ $24÷(\ \ \ \ )=3$
$45÷5=$ $30÷6=$ $18÷(\ \ \ \ )=2$ $6÷(\ \ \ \ )=3$
$24÷6=$ $63÷7=$ $9÷(\ \ \ \ )=3$ $7÷(\ \ \ \ )=1$
$36÷9=$ $35÷7=$ $12÷(\ \ \ \ )=3$ $10÷(\ \ \ \ )=5$
$35÷5=$ $18÷2=$ $28÷(\ \ \ \ )=4$ $32÷(\ \ \ \ )=4$
$16÷4=$ $72÷8=$ $27÷(\ \ \ \ )=3$ $3÷(\ \ \ \ )=3$

5 1 4 6
7 4 9 8
6 8 8 3
2 6 6 2
1 3 2 4
7 6 4 1
3 6 4 1
7 9 3 3
1 8 6 7
5 9 8 3
4 2 7 1
4 2 1 8
8 2 9 4
5 6 4 7
2 8 9 8
9 5 9 2
4 9 3 7
4 5 4 2
7 9 7 8
4 9 9 1