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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,*,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,*,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。,63,4,8,7,2,四、填空,一共买了多少瓶酸奶?,30,瓶,我要喝掉,2,瓶,30,瓶,妈妈一共买了32瓶,,妈妈还剩多少瓶?,30,2,32-2,想,一想:,2,30,32,30,32-30=,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,39,47,58,2,0,+,6,26,=,(只),树上有20只小鸟,填一填,2,60,8,有,43,个篮球,借走,3,个,还剩几个?,43-3=40(,个,),还要搬几张椅子?,-,=,38,30,8,有40个学生,5个老师。,每人一张凳子,有44张凳子,够坐吗?,45 44 不够坐。,20+8,8+20,2+50,36-6,49-9,28-8,45-5,50+2,40+5,谢谢,!,
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