÷=9 ÷=9 ÷=9
81÷9= 78+19= 72÷8= 5×7=
42÷6= 40-18= 64÷8= 9×4=
①41+5×9
②(34+29)÷9
③54-42÷6
④100-39+28
⑤42÷(18÷3)
⑥64÷8÷2