四年级数学上册第6单元《除数是两位数的除法》口算除法课件新人教版 .ppt

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1、口,算,除,法,可以分给几个班?,(1)有80个气球。,每班20个,4,4,4,4,想一想:83 20 ( )80 19 ( ),60 20 = 90 30 = 80 40 = 62 20 93 30 80 38 ,60 20 = 3 90 30 =3 80 40 = 2 62 20 3 93 30 3 80 38 2,(2)有120面彩旗。,可以分给几个班?,每班30面,120 30= (个),想一想:122 30 120 28 ,4,4,18030=,18430,24037,42060=,42058,24040=,6,6,(180),6,6,(40),7,7,(60),2、你能算对吗? (

2、1) 20 3 = 60 20 = (2) 60 4 = 240 60 =,2、你能算对吗? (1)20 3 = 60 60 20 =3 (2)60 4 = 240 240 60 =4,3、争夺智慧星。 42070= 21 4 = 1204 = 16 5 = 40080= 72080= 36060= 13 7 =,3、争夺智慧星。 42070= 6 21 4 = 84 1204 = 30 16 5 = 80 40080= 2 72080= 9 36060= 6 13 7 = 91,4、解决问题。,王伯伯买一块面积是360平方米 的长方形地种植葡萄。如果长方形地 的长时90米,宽是多少米?如果长

3、分 别是60米、40米、30米、20米呢?,4、解决问题。,王伯伯买一块面积是360平方米 的长方形地种植葡萄。如果长方形地 的长时90米,宽是多少米?如果长分 别是60米、40米、30米、20米呢?,把这些硬币换成10元一张的纸币, 最多能换多少张?如果换成20元一张 的纸币呢?50元一张的纸币呢?,5、解决问题:,我有182枚1元的硬币。,182 10 18(张),182 20 9 (张),182 50 3 (张),2、选择其中两个数,列出你学过的除法算式, 并标出结果。,120 40=3,123 40 3,236 60 4,240 60=4,268 30 9,270 30=9,120 30=4(笼) 答:可以装4笼。,1、四年级265人去春游。,需要派几 辆车呢?,每辆车限坐40人。,265 40 7(辆) 答:需要派7辆车。,2、植树节时,老师 带领我们去植树。,我们要在280米的马路一旁每隔40米种一棵树,记住两头都要栽哦!,到底要栽多少棵呢?,280 40=7(课) 7+1=8 (课) 答:要栽8棵。,

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