3时整,时针与分针夹角是 度,5时整,时钟与分针夹角是 度.
1.5: == %=.
%=3:4== ÷12.
= ÷45=3: = %==.
24÷ = :24== %= 折= (填小数).
0.3÷ =5:4=.