问题
填空题
______:______=
|
答案
(1)
=3:7.3 7
(2)3:7=(3×3):(7×3)=9:21=9÷21.
(3)
=3 7
=3×5 7×5
.15 35
故答案为3:7,21,
.15 35
______:______=
|
(1)
=3:7.3 7
(2)3:7=(3×3):(7×3)=9:21=9÷21.
(3)
=3 7
=3×5 7×5
.15 35
故答案为3:7,21,
.15 35