3×4
12+12+12+12:□〇□
7和9相加:□〇□
两个乘数都是8:□〇□
7个9相加:□〇□
乘法算式:×
6个2=( )
( )个6=( )
( )个3=( )
( )个( )=( )
加法算式:
乘法算式: