Question

calculiaza rapid folosind proprietatia de asociativitate a adunarii dupa model

Answer 1

a) 334 + 66 = 300 + ( 34 + 66) = 300 + 100 = 400
b) 127 + 273 = ( 127 + 73) + 200 = 200 + 200 = 400
c) 993 + 2 107 =(900 + 100)+ ( 93 + 7) + 2 000 = 1 000 +100+ 2 000 = 3 100
d) 4 675 + 1 325 = (4 000 + 1 000) + ( 675 + 325)= 5 000 + 1 000 = 6 000  
e) 35 275 +24 725 = (30 000 + 20 000)+ ( 5 275 + 4 725) = 50 000 + 10 000=
=  60 000