18. Efetue.

a) 2 x 22graus30mins
b) 5 x 25graus12mins15segundos
c) 15graus20mins : 4
d) 15graus10mins24segundos : 4

19. Calcule.

a) 2/3 de 15graus b) 3/4 de 90graus
c) 2/5 de 48graus30mins d) 5/6 de 60graus18mins6segundos

ME AJUDEM POR FAVOR E URGENTE !!!
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