三位數(shù)加減三位數(shù)（不進(jìn)位、不退位）的筆算回顧反思自主練習(xí)你問(wèn)我說(shuō)情境導(dǎo)入口算天天練23+15=36+22=47+32=64+21=76-23=98-74=35-24=69-18=3858795324118551320只我們一隊(duì)去杏園?，F(xiàn)在出發(fā)。86只我們?nèi)?duì)去桃園。我們四隊(duì)去梨園。103只210只我們二隊(duì)去蘋(píng)果園。一、情境導(dǎo)入一隊(duì)和二隊(duì)一共有多少只？二、你問(wèn)我說(shuō)320+210=（只）一隊(duì)有320只。二隊(duì)有210只。530十個(gè)百32個(gè)十加21個(gè)十等于53個(gè)十一隊(duì)和二隊(duì)一共有多少只？二、你問(wèn)我說(shuō)530320+210=（只）53個(gè)十是530一隊(duì)有320只。二隊(duì)有210只。320+210=（只）5302個(gè)十加1個(gè)十是3個(gè)十20+10=305個(gè)百加3個(gè)十是530500+30=5303個(gè)百加2個(gè)百是5個(gè)百300+200=500二、你問(wèn)我說(shuō)一隊(duì)和二隊(duì)一共有多少只？一隊(duì)有320只。二隊(duì)有210只。320+210=（只）530+035一隊(duì)和二隊(duì)一共有多少只？二、你問(wèn)我說(shuō)百位十位個(gè)位023012一隊(duì)有320只。二隊(duì)有210只。320+210=（只）530+035

返回一隊(duì)和二隊(duì)一共有多少只？二、你問(wèn)我說(shuō)百位十位個(gè)位300+200=50020+10=30500+30=530相同數(shù)位對(duì)齊20210下面三種方法，你喜歡哪種？為什么？二、你問(wèn)我說(shuō)320只我們一隊(duì)去杏園?，F(xiàn)在出發(fā)。86只我們?nèi)?duì)去桃園。我們四隊(duì)去梨園。103只210只我們二隊(duì)去蘋(píng)果園。問(wèn)題口袋320只我們一隊(duì)去杏園。我們一隊(duì)去杏園?，F(xiàn)在出發(fā)。86只我們?nèi)?duì)去桃園。我們四隊(duì)去梨園。103只210只我們二隊(duì)去蘋(píng)果園。我們二隊(duì)去蘋(píng)果園。一隊(duì)和四隊(duì)一共有多少只小蜜蜂？三隊(duì)和四隊(duì)一共有多少只小蜜蜂？320+103=423（只）86+103=189（只）324+153477634+20583929+540569465-132333750-520230857-37820三、自主練習(xí)1.填一填。2、蜜蜂采蜜我們一隊(duì)采蜜376桶我們?nèi)?duì)采蜜的桶數(shù)是一隊(duì)與二隊(duì)的和。我們四隊(duì)采蜜的桶數(shù)是一隊(duì)與二隊(duì)的差。我們二隊(duì)采蜜102桶。三隊(duì)采蜜多少桶？