①45+28+27=
②80-28-34=
③96-47+29=
④68+28-57=
⑤93-27-35=
⑥6+78-48=
①4+27=
②46-29=
③48+25=
④70-26=
⑤71-4-60=
⑥46+20-19=
⑦45-(24-6)=
①70-47=
②38+47=
③63-28=
④53+46-24=
⑤72-34-27=
⑥100-(35+38)=