陕旅版小学英语三年级下册Unit7ThereIsaTVintheClassroom第4课时PartBCountandsayHowmany?PartCLet’sdoquicklyA:Whatissevenandeight?7加8是几?B:Sevenandeightisfifteen.7加8是15.8﹢6﹦?12﹢4﹦?10﹢8﹦?13﹢4﹦?14﹢5﹦?11﹢9﹦?PartCLookandanswerHowmany…doyouhave?fifteenerasersthirteenpenstwelvecrayonstwentybookselevenbags