500-378=
485+268=
※609+235=
①※48 +765=
②※905-309=
③79×6=
④450×6=
⑤608×5=
423+508= ★700-125= ★586+544=
225×6= 609×7= (706-386)×5=
37×8= 78÷6=
467÷4= 620×9=
1,3,2,6,4,9,8,,,15,,18,……