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Dariusel6152
a fost răspuns

Efectueaza , respectand regulile invatate pentru a calcula mai repede

a) 294864+293663+292462+5136+6337+7538

b)386×99=386×(100-1)

c)2485×999

d)4×825+4×157+4×1018

e) 5496:12+5352:12

Răspuns :

Adrianalitcanu2018
a)
294864+293663+292462+5136+6337+7538=
=(294864+5136)+(293663+6337)+(292462+7538)=
=300000+300000+300000=
=900000

b)
386*99=386*(100-1)
386*99=386*99
386*99-386*99=0
38214-38214=0
0=0 (adevarat)

c)
2485*999=
=2485*1000-2485=
=2485000-2485=
=2482515

d)
4*825+4*157+4*1018=
=4*(825+157+1018)=
=4*2000=
=8000

e)
5496:12+5352:12=
=1/12*(5496+5352)=
=1/12*10848=
=10848/12=
=904

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