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b)5376x453+4624x298+4624x702+5376x547
c)357x459+459x321+678x541


Răspuns :

Răspuns:

B) 10⁷

C) 678000

Explicație pas cu pas:

B)

5376x453+4624x298+4624x702+5376x547=

5376(453+547)+4624(298+702)=

5376×1000+4624×1000=

1000(5376+4624)=

1000×10000=10³×10⁴=10⁷

C)

357x459+459x321+678x541=

459(357+321)+678×541=

459×678+678×541=

678(459+541)=

678×1000=

678000