5×<16
×4<20
4×<25
4×<21
×6<20
34>5×
4+4+4+4=×
5+5+5+6=×+
33=6 55=25 46=24 128=4
①58+26=
②95-57=
③☆46+24-20=
④☆53-9-37=
⑤☆85-(36+20)=