问题
填空题
4:
|
答案
(1)4:
=(4×4):(9 4
×4)9 4
=16:9
(2)设后项是x,根据题意得
(16×5):x=16:9
80:x=16:9
16x=80×9
16x=720
x=45
故填16:9,45.
4:
|
(1)4:
=(4×4):(9 4
×4)9 4
=16:9
(2)设后项是x,根据题意得
(16×5):x=16:9
80:x=16:9
16x=80×9
16x=720
x=45
故填16:9,45.