①(1/2+1/4-3/8)÷1/24 ②17/16*15+17/16

问题描述:

①(1/2+1/4-3/8)÷1/24 ②17/16*15+17/16

①(1/2+1/4-3/8)÷1/24
=(1/2+1/4-3/8)*24
=12+6-9
=9
②17/16*15+17/16
=17/16*(15+1)
=17