Question

2) CALCULE MENTALMENTE e responda abaixo:
a) 18%de 300 KG

b) 44% de R$ 400,00

c)25% de 150g de sal

d) 33% de 200 KM

e) 19%de 840 M

Answer 1

Olá

a) 18% de 300kg

100%------300

18%--------x

100.x = 300.18

100x = 5400

x = 5400/100

x = 54

b)44% de R$ 400,00

100%------400

44%-------x

100.x = 44.400

100x = 17600

x = 17600/100

x = 176

c) 25% de 150g de sal

100%--------150

25%---------x

100.x = 25.150

100x = 3750

x = 3750/100

x = 37,5

d) 33% de 200km

100%-------200

33%--------x

100.x = 33.200

100x = 6600

x = 6600/100

x = 66

e) 19% de 840m

100%-----840

19%--------x

100x = 19.840

100x = 15960

x = 15960/100

x = 159,6

Espero ter ajudado.