1- Resolver as proporções:
a) 2/× = 10/15
b) 2/3 = 9/×
c) 4/× = 16/20
Soluções para a tarefa
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a)
2/x = 10/15
2/3 = 10/15
b)2/3 = 9/x
2/3 = 9/13,5
c)4/x = 16/20
4/5 = 16/20
2/x = 10/15
2/3 = 10/15
b)2/3 = 9/x
2/3 = 9/13,5
c)4/x = 16/20
4/5 = 16/20
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A)2/x = 10/15
10x = 2 × 15
10x = 30
x = 30 ÷ 10
x = 3
b)2/3 = 9/x
2x = 3× 9
2x = 27
x = 27/3
c)4/x = 16/20
16x = 4 × 20
16x = 80
x = 80÷ 16
x = 5
10x = 2 × 15
10x = 30
x = 30 ÷ 10
x = 3
b)2/3 = 9/x
2x = 3× 9
2x = 27
x = 27/3
c)4/x = 16/20
16x = 4 × 20
16x = 80
x = 80÷ 16
x = 5
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