① × ×3
②87×
③ - ×
④ ÷ ×
⑤3.7× +1.3÷
⑥ ÷(3- - )
①:
②0.07:0.9
③14:
④:
⑤3.6:4
⑥105:15
÷= ×= 4÷= 1.2×=
÷0.5= 4.9×= 1.2×= 1÷×
每棵元数
2
4
6
8
买的棵数