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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,整十数加一位数,及相应的减法,说说数的组成:,25,63,_,个十,,_,个一,,合起来是,_,。,5,2,25,_,个十,,_,个一,,合起来是,_,。,3,6,63,20,+,5,=,25,加法,5,+,20,=,25,一、数的合与分,:,二、填空,:,5,个一是,( ),3,个十和,5,个一是,( ),三、口算,:,10+6= 3+10= 10+9=,35,16,13,19,5,25,5,60,58,1. 5,个十和,8,个一合起来是(,)。,2. 6,个十和,3,个一合起来是( )。,3. 48,里面有( )十和( )个一 。,4. 27,里面有( )个一和( )个十 。,63,4,8,7,2,一共买了多少瓶酸奶?,30,瓶,我要喝掉,2,瓶,30,瓶,2,30,想一想:,30,2,32-2,先摆,再摆,一共,50,6,56,摆出,拿走,还剩,35,_,5,30,十位 个位,40,+,2,=,42,40,+,2,=,42,加数,加数,和,40+9,4+30,8+20,20+8,30+4,9+40,填空:,()(),()(),()(,),()(,) ,()() ,()(,) ,十位 个位,42,-,2,=,40,42,-,2,=,40,被减数,减数,差,-,=,45,5,40,-,=,45,40,5,+,=,50,7,57,-,=,57,7,50,+,=,7,50,57,-,=,57,50,7,20+5=25,34-4=30,看图列式,+,=,20,8,28,-,=,28,8,20,+,=,8,20,28,-,=,28,20,8,填一填,39,47,58,填一填,2,60,8,有,43,个篮球,借走,3,个,还剩几个?,43 - 3 = 40 (,个,),根据上图列算式并计算。,-,=,38,30,8,谢谢,!,
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