1.280/14=40/( )= ( )

问题描述:

1.280/14=40/( )= ( )
2.700/25=( )/100=( )
3.从4:15到4:30.分针旋转了( )度

1.280/14=40/X
X=14X40/280
X=2
则280/14=40/2=20
2.同理:
700/25=X/100
X=700X100/25
X=2800
即:700/25=2800/100=28
3.90度