Question

calcule o termo desconhecido :

a) ()+3=12
()=
()=

b)()+15=30
()=
()=

c)()-38=117
()=
()=

d)()+40=52
()=
()=

Answer 1

A) ?+3=12
?=12-3
?= 9
 
B)?+15=30
?=30-15
?=15

C)?-38=117
?=117+38
?=155

D)?+40=52
?=52-40
?=12