1、整十数加减整十数,我会填,1. 65是由( )个十和( )个一组成的。,2. 29是由( )个一和( )个十组成的。,3. 个位上是7,十位上是4,这个数是( )。,4. 十位上是7,个位上是4,这个数是( )。,6,5,9,2,47,74,口答: 35=30+( ) 57=7+( )65=60+( ) 29=9+( ),5,20,5,50,找到答案和我一样的小动物去我家做客!,6+70,76,70+6,60+7,50+2,5+10,在复习中你有什么收获,56,整十数加减整十数,红花和黄花一共有多少盆?,10,+,20,= 30,还有( )盆 紫花。,我要搬走10盆。,30,-,10,= 20
2、,30,3个十,2个十,红花: 10朵。,黄花: 20朵。,57,整十数加减整十数,整十数加减整十数,70,40,40,+,20,= 60,- -,20 40,= 60,+,20 = 40,60 60,40 = 20,7个十,4个十,57,练习十,5,50,9,90,2,20,40,+,3,= 43,40,+,30,= 70,58,练习十,5,9,50,90,5,2,50,20,58,练习十,这里有50个花生。,我要10个。,我要20个。,还剩多少个花生?,-,-,50,10,20,= 20( 个 ),40,口答:还剩( )个花生。,20,58,练习十,40+20=,60,50+20=,70,30+20=,50,50+20+30=,100,