2×3= 4×3= 73-42= 5×5-6=
4×9= 54+29= 6×8= 7×9+17=
6+7= 9×8= 23-7= 3×8-4=
9×9= 3×7= 6×4= 9×6+30=
①87-38=
②56+37=
③61-(21-6)=
④48+6-29=
⑤64-(17+28)=
五五 六八
二九 四六 八三十二
383,494,88,699,997,1004,571