÷ × ÷9 × × ÷
45× 求的是;45+45× 求的是,求这个问题还可以列式为.
×6= ×8 ×3.2= 12÷ = × =
3﹣ = × ÷ = ÷ ÷ =
① × ÷
② ÷23+ ×
③ +( + )
④35×
⑤( + )×20