Explicație pas cu pas:
a)247+x=783
x=783-246
x=536
v:247+536=783✔
b)x+318=2 467
x=2 467-318
x=2 149
v:2 149+318=2 467✔
c)735-×=517
x=735-517
x=218
v:735-218=517✔
d)x-482=267
x=267+482
x=749
v:749-482=267✔
e)23 536-×=10 039
x=23 536-10 039
x=13 497
v:23 536-13 497=10 039✔
f)4 357+x+937=6 251
4 357+×=6 261-937
4 357+×=5 314
x=5 314-4 357
x=957
v:4 357+957+937=5 314+937=6 251✔
g)873-×=243
x=873-243
x=630
v:873-630=243✔
h)x-215=772
x=772+215
x=987
v:987-215=772✔
i)7 815-×+737=3 511
7 815-×=3 511-737
7 815-×=2 774
x=7 815-2 774
x=5 041
v:7 815-5 041+737=2 774+737=3 511✔
