4×6+6=
5×7+6=
6×6+4=
8×5-7=
8×3+8=
8×9-9=
124×36=
207×17=
360×55=
①408×25=
②37×325 =
③47×210 =
④260×40 =
①426×25=
②708×49=
③830×74=
①265×42=
②39×280=
③15×602=
④580×70=
27+19=19+ 183+23=+183
46×=23× 76×28=×76
187+129+118=187++
230+(170+82)=(+)+82
37+16+63+84=(37+)+(+)
96703<9□805 4□37900<4582000 27□128>274600