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Calculati grupand convenabil termenii:
a) 54+435+46+65;
b)1499+368+632+1';
c)5130+253+15+870+747;
d)23451+759+529.

Va rog sa ma ajutati.Ofer 15 puncte.Multumesc.

Răspuns :

Gandac
a)
54+435+46+65=
(435+65)+(54+46)=
500+100=600

b)
1499+368+632+1=
(1499+1)+(368+632)=
1500+1000=2500

c)
5130+253+15+870+747=
(5130+870)+(253+747)+15=
6000+1000+15=
7000+15=7015

d)
23451+759+529=
23451+(759+529)=
23451+1288=24739

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