人教版三年級數(shù)學(xué)上冊《時分的認(rèn)識》ppt課件

1、,,時 分的認(rèn)識,人教新課標(biāo)版三年級數(shù)學(xué)上冊,,,,,,,,,,,,,,,,12,1,2,3,4,5,6,7,8,9,10,11,,,,,,,,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,&

2、#183;,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,看一看小鐘上面都有些什 么！,時針,分針,秒針,時針,分針,秒

3、針,,每個大格分成 個小格。,,鐘面上一共有 個小格,5,鐘面上一共有,個大格。,12,,60,,,,,,,,,,,,,,,12,1,2,3,4,5,6,7,8,9,10,11,,,,,,,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,

4、3;,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,·,

5、·,,,5,10,15,20,25,30,35,40,45,50,55,60,,12,2,1,11,9,6,3,4,5,7,8,10,,,,,,,,,,,,,,,,,,,更多全套課件免費下載：綠色圃中小學(xué)教育網(wǎng)http://www.lspjy.com,,,時針走1小時，分針正好走 ，是,分。,,一圈,60,時= 分,,,1,60,,分針走一小格的時間是1分。,時針走一大格的時間是1小時。,分,感受一分鐘

6、,一分鐘的價值,一分鐘點鈔機點1500張人民幣 一分鐘高速火車可行駛1980米 一分鐘人造衛(wèi)星可運行1920公里 一分鐘生產(chǎn)煤炭1902噸、發(fā)電106423度 一分鐘激光可走1800萬公里，等于繞地球450圈,40,10,10,一節(jié)課是（ ）分 課間休息是（ ）分 再加上（ ）分就是1小時,填一 填,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,1

7、0,11,,,,,1 時,1,鐘表上分針指著12，時針指著數(shù)字幾，這時的時刻就是幾時。,,,00,：,,,,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,,,,,4 時,4：00,,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,,,,,6 時,6：00,,,,.,.,.,.,.,.,.,.,.,.

8、,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,,,,,9 時,9：00,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,,,,鐘表上時針剛走過數(shù)字幾，分針從12起,走了多少個小格，,這時的時刻就是幾時幾分。,,,,,10時15分,：,,10,15,,,,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8

9、,10,11,,,,,,4時45分,4：45,,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,,,,,6時5分,6： 5,0,,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,10,11,,,,,,8時55分,8：5 5,,,,.,.,.,.,.,.,.,.,.,.,.,.,.,12,3,6,9,1,2,4,5,7,8,1