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想一想 : ( ) 最大能填几 ? PowerPoint PPT Presentation


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想一想 : ( ) 最大能填几 ?. 40×( ) < 316 90 ×( ) < 643 50×( ) < 408 80 ×( ) < 505. 除数是两位数的除法法则. 1. 从被除数的 ( ) 位除起 , 先用除数的前 ( ) 位数 , 如果它比除数小 , 再试除前 ( ) 位。 2. 除到被除数的哪一位 , 就在那一位上面写 ( ) 。 3. 每求出一位商,余下的数必须比除数 ( ) 。. 最高. 两. 三. 商. 小. 32. 7 6 8. 2.

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想一想 : ( ) 最大能填几 ?

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6424781

:( )?

40( )316 90 ( )643

50( )408 80 ( )505


6424781

  • 1.( ) ,( ),,( )

  • 2.,( )

  • 3.( )


6424781

32

7 6 8

2

4

8

6 4

1 2

1 2 8

0


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32

5 7 6

,57618

57618=

32

:32


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  • 1.,,,

  • 2.,

  • 3.


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1

2.

3


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(1)167025 (2)650167

(3)118941 (4)697682


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2

2

9

9

8

8


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ab9113


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ab9102

ab91010


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2.361010

3.5030 ( )

4.


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  • 48020

  • 4667


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585

390

780

1.12


2 23 598 1 2 23

2.235981223


3 64 900 15

3.6490015


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