Fatore as expressões a seguir.
a) 15 − 30 + 45 = __________________________________________
b) 18
5
2 − 24
3
6 + 42
4
4 = __________________________________
c) + 3
2 + 7 + 21 = ________________________________________
d)
2 + 2
2 − 8 − 16 = _______________________________________
e)
2 − 64 = ___________________________________________________
f)
8
6 − 36 = __________________________________________________
g)
2 + 24 + 144 = ______________________________________________
h)
2 − 8 + 16
2 =