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Exercício de Grandezas diretamente proporcionais
Exercício:
A quantia de R$1280,00 deverá ser dividida entre 3 pessoas. Quanto receberá cada uma, se:
a) A divisão for feita em partes diretamente proporcionais a 8, 5 e 7?
b) A divisão for feita em partes inversamente proporcionais a 5, 2 e 10?
A) 8 + 5 + 7 = 20
1280,00/20= 64,00
8 x 64,00= 512,00
5 x 64,00= 320,00
7 x 64,00= 448,00
Total = 1280,00
Resultado: Uma receberá R$ 512,00; a segunda R$ 320,00 e
a terceira receberá R$ 448,00.
B)X/1/5 + Y/1/2 + W/1/10=8/10
total=1280 reais
1280/ (8/10)=1280/0.8 =1600
X/1/10 x 1600 ;X =1600 x 1/10 = 1600/10 =160
Y/1/2 x 1600; Y =1600/2 Y=800
W/1/10 x 1600 ; W= 1600/10 ; W =160
a) k=total/soma direta
k=1280/8=5=7
k=1280/20
k=64(fator)
1º 64.8=512
2º 64.5=320
3º 64.7=448
Totalizando=1280
b) Inversamente
k=total/soma indireta
k=1280/1/5+1/2+1/10
k=1280/1/5+1/2+1/10|10
k=1280/8/10
k=160.10
k=1600(fator)
1º 1600.1/5=320
2º 1600.1/2=800
3º 1600.1/10=160
totalizando=1280
X= numero de dinheiro= base total
então a)
k=total/soma direta k=1280/8=5=7k=1280/20k=64(fator)1º 64.8=5122º 64.5=3203º 64.7=448Totalizando=1280
grrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
qual é a resposta certa?????? como vou saber se cada um coloca uma coisa diferente?????
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