1.

5 × 2 =
÷
=
÷
=

3 × 3 = 9
9 ÷ 3 = 3
答案:1. 10 10÷2=5 10÷5=2 9 9÷3=3
2.

×
=
÷
=
÷
=
×
=
÷
=
÷
=
答案:2. 4×2=8 8÷2=4 8÷4=2 5×3=15 15÷3=5 15÷5=3
3. $3×1=$ $4×2=$ $6×3=$ $5×0=$
$3÷1=$ $4÷2=$ $6÷3=$ $0÷5=$
答案:3. 3 8 18 0 3 2 2 0
4. $30÷6=$ $8÷4=$ $12÷3=$
$16÷4=$ $36÷6=$ $20÷5=$
$18÷3=$ $5÷5=$ $6÷1=$
$25÷5=$ $12÷4=$ $18÷6=$
答案:4. 5 2 4 4 6 4 6 1 6 5 3 3
5.

要栽5行。一共要栽30棵树。平均每行栽多少棵?
答案:5. 30÷5=6(棵)