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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,*,十几减几,人教新课标一年级数学下册,教学目标,理解“十几减几”的算理,学会“十几减几”的口算方法,正确计算“十几减几”的题目。,能根据自己的情况用自己喜欢的方法较熟练地计算“十几减几”的题目。,体验数学与生活的密切联系和探索学习的乐趣。,12-=,12-=,13-=,13-=,4,8,8,4,6,7,7,6,1.,列一列,.,说一说,6+5=,11-5=,7+8=,15-7=,4+8=,12-4=,2.,算一算 有发现,11,6,15,8,12,8,1,8+=11,11-3=,8+=16,16-8=,+9=15,15-6=,2.,算一算 有发现,2,3,8,8,8,6,9,-=,-=,13,5,6,11,7,6,3.,我会解决问题,4.,抢答,.,并写算式,14,11,12,16,15,17,10,13,-8,2,4,5,3,4,5,3,11-,12-,我有,15,元,我有,13,元,小明,小红,汉堡:,9,元,可乐:,6,元,鸡腿:,7,元,15-9=,13-7=,3,10,3,6,5,10,1,6,小动物喜欢吃什么,我会写算式,13-=,-6=,-=5,我来试一试,12,3,11,5,16,7,14,8,13,5,15,8,9,12,8,4,8,17,7,15,6,6,7,7,5,12,9,9,6,6,8,7,3,12,9,8,12,0,7,看图列式,=,=,=,=,=,=,=,=,5,8,13,5,8,13,13,13,8,5,5,8,+,+,+,+,-,-,7,7,7,7,9,9,9,9,16,16,16,16,-,-,用数学,=,(只),12,-,5,7,猜猜我是谁,1.,我比,15,小,6,,我是()。,2.8,比我小,5,,我是()。,3.,我加上,7,得,15,,我是()。,4.18,减去我,还是我,我是()。,9,13,8,9,
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