Răspuns :
Răspuns:
a) 125 + 1235 +434 = ( 125 +1235) + 434
= 1360 + 434
= 1794
125 + 1235 + 434 = 125 + ( 1235 + 434 )
= 125 + 1669
= 1794
b) 235 + 1345 + 2350 =(235 + 1345)+2350
= 1580 + 2350
= 3930
235 + 1345 + 2350 = 235 + ( 1345 + 2350 )
= 235 + 3695
= 3930
c) 6099 + 75 + 1020 = ( 6099 + 75 ) + 1020
= 6174 + 1020
= 7194
6099 + 75 + 1020 = 6099 + ( 75 + 1020 )
= 6099 + 1095
= 7194
d) 4012 + 320 + 1999 = (4012 + 320)+ 1999
= 4332 + 1999
= 6331
4012 + 320 + 1999 = 4012 + ( 320 + 1999)
= 4012 + 2319
= 6331
e) 2358+1234+4398 =(2358 + 1234)+4398
= 3592 + 4398
= 7990
2358+1234+4398 = 2358 + ( 1234 + 4398 )
= 2358 + 5632
= 7990