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һPPT > PPTn > Wn > u꼉Wƒ > 殐Ŀ¡PPTMn(3nr)

殐Ŀ¡PPTMn(3nr)

殐Ŀ¡PPTMn(3nr) ԔB:

殐Ŀ¡PPTMn(3nr)殐Ŀ¡PPTMn(3nr)

u꼉Wƒԡ殐Ŀ¡PPTMn(3nr)16

̽

765 + 372 + 635 + 628

=765+635+372+628

=1400+1000

=2400

ӷQ: +b=b+

ӷY:(+b)+c=+(b+c)

Ӌ}Ŀ

7.65 + 3.72 + 6.35 + 6.28

=7.65+6.35+3.72+6.28

=14+10

=24

... ... ...

PI~殐Ŀ¡ţPPTnMd.PPTʽ

殐Ŀ¡PPTMn(3nr) dַ:

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cnPPPTn:

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