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