Question

gaseste numerele necunoscute:
a:10+300=400
(35+b)ori10-25=325
(c-25):5+90=100
(200-d):10+90=100
500:e+(300:10-20=60
(30ori10)-(4oriF+50ori2)=100
dau coronita!

Answer 1

a. a/10=100⇒a=1000;
b. [35+b]·10=350
⇒35+b=35⇒b=0;
c. [c-25]/5=10
⇒c-25=50⇒c=75;
d. [200-d]/10=10
⇒200-d=100⇒d=100;
e. 500/e+10=60
⇒500/e=50⇒e=10;
f. 300-[4f+100]=100
⇒4f+100=200
⇒4f=100⇒f=25;

Answer 2

a=? 400-300=100; a= 100×10=1000/ Veroficare: 100×10+300=400/ b=? 325+25=350; 350:10=35; b= 35-35=0/ Verificare: (0+35)×10-25=350/ c=? 100-90=10; 10×5=50; c= 50+25=75/ Verificare: (75-25):5+90=100/ d=? 100-90=10; 10×10=100; d= 200-100=100/ Verificare: (200-100):10=100/ e=? 300:10-20=10; 60-10=50; e= 500:50=10/ Verificare: 500:10-10=60/f=? 30×10=300; 50×2=100; 300+100=400; 400-100=300; f= 300:4=75/ Verificare: 300-75×4+100=100