×=
×30= ÷ = + = ÷ = 0× =
3.2÷0.4= 5- = × = 1.21× = ÷2.2=
□-□=□(个)
□-□=□(只)
身高
120cm-130cm
131cm-140cm
141cm-150cm
151cm-160cm
人数/人
1÷0.25= 15×60= 72×25%=
1.1-0.01= 12÷ =
24×( )=