Răspuns:
a) (m-416:4+2) •5=1980
(m- 104+2)=1980:5
m-104+2=396
m-104=396-2
m-104=394
m =394+104
m=498
b)2•248+a=842
496+a=842
a=842-496
a=346
b-387:3=414
b-129=414
b=414+129
b=543
d)6•6=606 nu e complet
(795:5-154)•m=715
(159-154)xm=715
5xm=715
m=715:5
m=143