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si la mate va rog la ex 2 grupeaza convenabil termenii pentru a calcula rapid .a) 2400+1820+2600+1080; b)350+2500+350+2500; c)1175+1300+1125+1700

Răspuns :

A)2400+1820+2600+1080
(2400+2600)+(1820+1080)
5000+2900=7900
B)350+2500+350+2500
(350+350)+(2500+2500)
700+5000=5700
C)1175+1300+1125+1700
(1175+1125)+(1300+1700)
2300+3000=5300

Sper ca te.am ajutat!
a) (2400+2600)+(1820+1080)=
b) (350+350)+(2500+2500)=
c) (1175+1125)+(1300+1700)=
Rezolvi tu exercițiile.