-除数是一位数的除法.pdf

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1、1/4 第一部分：知识要点1.口算除法类型：1 商是整十、整百数的除法例：3005 12006 2 商是几百几十数（几千几百数）的除法例：4503 7204 方法：1、看除法想乘法 2、想表内除法3、想除法的意义：平均分2.估算除法类型：除数是一位数的除法的估算例：1846 8983方法：除数不变，想除法的口诀，把被除数估算成与之接近的整百整十数。3.笔算除法类型：被除数是两位数的除法:1 没有余数例：786 2 有余数例：954 被除数是三位数的除法：1 被除数中间和末尾有0 的除法例：5048 8403 2 商中间和末尾有0 的除法例：4324 9807 除法的计算口诀：除数是一位，先看最

2、高位。一位不够看两位，除到哪位商那位。不够商 1 不能跳，商 0 占位不可少。每次除后要比较，余数要比除数小。2 个结论：1 被除数中间和末尾有0 时，商中间和末尾不一定有0；2 被除数中间和末尾没有0，商中间和末尾可能有0。4.除法的验算：（用乘法验算除法）无余数时：商 除数=被除数例：计算并验算 252 6 有余数时：商 除数+余数=被除数例：计算并验算 589 8 5关于 0 的除法：0 除以任何不为 0 的数商是 0；6对比旧知识：任何不为0 的数除以 1 商是它本身；7.0 乘以任何数都得 0。课题除数是一位数的除法（一）学生姓名年级三年级日期2/4 第二部分：课堂巩固1、口算下面各

3、题。200 5=120 6=2400 6=100 5=3 200=350 7=5005=1 006=2000 2=1200 4=7007=20005=1604=120 3=1500 3=8008=6309=4004=49007=5406=2、填一填，在（）里填上合适的数。40 x()=240 8x()=32 6x()=4200 90 x()=490 6x()=3600 2x()=1400 30 x()=2700 8x()=6400 7x()=5600 3、估算829 2414 2354 16223308 1216 1598 260 41946 2975 4257 13872679 4409 4

4、107 36051786 1813 4609 43574、用竖式计算。462 933 753 846 884 2575 7128 1834 3726 1855 548 2093 8567 2498 3435 文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7

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8、 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7

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11、完?（3）、一个星期有 7 天，366天里有多少星期又几天？（4）、学校买来 6 箱图书，每箱 120本，平均分给 5个年级，每个年级分得多少本?（5）、小林 3 分钟跳了 291下，小花 4分钟跳了 372下，谁跳得快?（6）、孙爷爷今年 96岁，韩芳今年 8岁。6 年前，孙爷爷的年龄是韩芳的几倍?（7）、体育老师买了2 个篮球，用了144 元，又买了 3 个足球，每个足球的价钱和篮球的价钱同样多。买足球用了多少钱?文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y

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18、6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R34/4 第三部分：课后作业文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5 HZ7U2F4V7Y3 ZJ4J6P7Q5R3文档编码:CK1Y6I8E2L5

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