Question

這家超市一天營(yíng)業(yè)幾個(gè)小時(shí)？

Answer 1

分析：首先把時(shí)間化成24時(shí)計(jì)時(shí)法來(lái)表示，然后用營(yíng)業(yè)結(jié)束時(shí)間減去營(yíng)業(yè)開(kāi)始時(shí)間，即可得解．

解答：解：8時(shí)+12時(shí)=20時(shí)，
20時(shí)-9時(shí)=11時(shí)；
答：它一天的營(yíng)業(yè)時(shí)間是11小時(shí)．

點(diǎn)評(píng)：此題考查了時(shí)間的推算，即用營(yíng)業(yè)結(jié)束時(shí)刻-營(yíng)業(yè)開(kāi)始時(shí)刻=營(yíng)業(yè)時(shí)間．