AndraMaria1034ask
a fost răspuns

efectuati utilizand factorul comun
3×45+3×15
20×48+20×2
28×521-28×21
23×718-162×23
15×38+15×162
702×65+35×702
2413×1001-2413
2029×599+2029
1289×337+1289×663
Acestea sunt le puteti nota cu a) b) etc.
sunt calcule​

Răspuns :

Ignatovvlad201ask
a)3*45+3*15=135+45=180
b)20*48+20*2=20(48+2)=20*50=1000
c)28*521-28*21=28(521-21)=28*500=14000
d)23*718-162*23=23(718-162)=23*556=12788
e)=15(38+162)=15*200=3000
f)=702(65+35)=702*100=70200
g)=2413(1001-1)=2413*1000=2413000
h)=2029(599+1)=2029*600=1217400

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