ID: 21074147

第11课时 做个减法表(课件)(共15张PPT)2024-2025学年北师大一年级数学上册

日期:2024-11-25 科目:数学 类型:小学课件 查看:100次 大小:3915119B 来源:二一课件通
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2024-2025,数学,年级,大一,北师,学年
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(课件网) 做个减法表 北师版一年级上册 4 激趣导入 6-0= 6-2= 6-3= 6-4= 6-5= 10-2= 9-1= 8-0= 7-6= 7-1= 7-7= 7-3= 7-5= 6-1= 有哪些算式都是6减几的? 有哪些算式得数都是8? 6-6= 8-0= 6-5= 9-1= 探究新知 与同伴合作,整理减法算式,排一排。 … … 按照一定的顺序…… 下面是笑笑做的减法表,请你帮她填完整。 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5-4 4-3 3-2 2-1 1-0 10-8 9-7 8-6 7-5 6-4 5-3 4-2 3-1 2-0 10-7 9-6 8-5 7-4 6-3 5-2 4-1 3-0 10-6 9-5 8-4 7-3 6-2 5-1 4-0 10-5 9-4 8-3 7-2 6-1 5-0 10-4 9-3 8-2 7-1 6-0 10-3 9-2 8-1 7-0 10-2 9-1 8-0 10-1 9-0 10-0 竖着看,横着看,斜着看,你发现了什么规律? 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5-4 4-3 3-2 2-1 1-0 10-8 9-7 8-6 7-5 6-4 5-3 4-2 3-1 2-0 10-7 9-6 8-5 7-4 6-3 5-2 4-1 3-0 10-6 9-5 8-4 7-3 6-2 5-1 4-0 10-5 9-4 8-3 7-2 6-1 5-0 10-4 9-3 8-2 7-1 6-0 10-3 9-2 8-1 7-0 10-2 9-1 8-0 10-1 9-0 10-0 横着看,得数递增1,被减数相同,减数递减1 竖着看,得数不变,被减数和减数都递减1 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5-4 4-3 3-2 2-1 1-0 10-8 9-7 8-6 7-5 6-4 5-3 4-2 3-1 2-0 10-7 9-6 8-5 7-4 6-3 5-2 4-1 3-0 10-6 9-5 8-4 7-3 6-2 5-1 4-0 10-5 9-4 8-3 7-2 6-1 5-0 10-4 9-3 8-2 7-1 6-0 10-3 9-2 8-1 7-0 10-2 9-1 8-0 10-1 9-0 10-0 斜着看,得数递减1,被减数递减1,减数不变 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5-4 4-3 3-2 2-1 1-0 10-8 9-7 8-6 7-5 6-4 5-3 4-2 3-1 2-0 10-7 9-6 8-5 7-4 6-3 5-2 4-1 3-0 10-6 9-5 8-4 7-3 6-2 5-1 4-0 10-5 9-4 8-3 7-2 6-1 5-0 10-4 9-3 8-2 7-1 6-0 10-3 9-2 8-1 7-0 10-2 9-1 8-0 10-1 9-0 10-0 你会填吗? 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5-4 4-3 3-2 2-1 1-0 10-8 9-7 8-6 7-5 6-4 5-3 4-2 3-1 2-0 10-7 9-6 8-5 7-4 6-3 5-2 4-1 3-0 10-6 9-5 8-4 7-3 6-2 5-1 4-0 10-5 9-4 8-3 7-2 6-1 5-0 10-4 9-3 8-2 7-1 6-0 10-3 9-2 8-1 7-0 10-2 9-1 8-0 10-1 9-0 10-0 竖着填 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5-4 4-3 3-2 2-1 1-0 10-8 9-7 8-6 7-5 6-4 5-3 4-2 3-1 2-0 10-7 9-6 8-5 7-4 6-3 5-2 4-1 3-0 10-6 9-5 8-4 7-3 6-2 5-1 4-0 10-5 9-4 8-3 7-2 6-1 5-0 10-4 9-3 8-2 7-1 6-0 10-3 9-2 8-1 7-0 10-2 9-1 8-0 10-1 9-0 10-0 斜着填 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5-4 4-3 3-2 2-1 1-0 10-8 9-7 8-6 7-5 6-4 5-3 4-2 3-1 2-0 10-7 9-6 8-5 7-4 6-3 5-2 4-1 3-0 10-6 9-5 8-4 7-3 6-2 5-1 4-0 10-5 9-4 8-3 7-2 6-1 5-0 10-4 9-3 8-2 7-1 6-0 10-3 9-2 8-1 7-0 10-2 9-1 8-0 10-1 9-0 10-0 3-( )=7-( ) 5-( )=8-( ) 3-(3)=7-(7) 3-(2)=7-(6) 3-(1)=7-(5) 5-(5)=8-(8) 5-(4)=8-(7) 5-(3)=8-(6) 5-(2)=8-(5) 5-(1)=8-(4) 1.填一填。 3-(0)=7-(4) 5-(0)=8-(3) 课堂提升 点击图形出示 2.爬台阶。 10- = 2 8 3.数一数铅笔的个数。 1 课堂小结 0 1 2 3 4 5 6 7 8 9 10 10-10 9-9 8-8 7-7 6-6 5-5 4-4 3-3 2-2 1-1 0-0 10-9 9-8 8-7 7-6 6-5 5 ... ...

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