Question

va rog mult ex 2 urgent!! dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 2·9+2·1-2·5=2(9+1-5)=2·5=10

b) 32·17+32·11-32·8=32(17+11-8)=32·20=640

c) 13·90+20·13-26·2=13·90+13·20-13·2·2=13(90+20-4)=13·106=1378

d) 12·25+50·13-75·9= 12·25+2·25·13-3·25·9=25(12+2·13-3·9)=25(12+26--27)=25·11=275

e) 13·1000+200·3-26·500=13·100·10+2·100·3-13·2·5·100=

=100(13·10+2·3-13·10)=100(2·3)=100·6=600

f)19000+2000-11000=1000(19+2-11)=1000·10=10000

g) 239·180-360·103-90=239·2·90-4·90·103-90= 90(239·2-4·103-1)=

=90(478+412-1)=90·889=80010

h) 505·6-101·12+202·5=5·101·6-101·12+2·101·5=101(5·6-12+2·5)=

=101(30-12+10)=101·28=2828