脱式计算，能简算的要简算．118-46+82-54；40%÷9+19×15；98×[（8÷6-1）÷34]．

Question

脱式计算，能简算的要简算．
118-46+82-54；              40%÷9+(1)/(9)×(1)/(5)；              (9)/(8)×[（8÷6-1）÷(3)/(4)]．

Answer 1

①118-46+82-54
=（118+82）-（46+54）
=200-100
=100

②40%÷9+(1)/(9)×(1)/(5)
=(2)/(5)×(1)/(9)+(1)/(9)×(1)/(5)
=(1)/(9)×（(2)/(5)+(1)/(5)）
=(1)/(9)×(3)/(5)
=(1)/(15)

③(9)/(8)×[（8÷6-1）÷(3)/(4)]
=(9)/(8)×（(1)/(3)×(4)/(3)）
=(9)/(8)×(4)/(9)
=(1)/(2)