Răspuns:
Notam x-numarul cautat
a)
x+3.462=10.000
x=10.000-3.462
x=6.538
b)
x-300=99.990
x=99.900+300
x=100.200
c)
x×2=301.070
x=301.070÷2
x=150.535
d)
x÷4=4.444
x=4.444×4
x=17.776
