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taynamartins2299
@taynamartins2299
April 2022
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Ajudem??!
Usando regra de Três!!
a) No 7 ano B, 12 há 12 meninas, que representam 40% da classe. Nessa classe, há ________ meninos.
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alinnegomes
12 - 40%
x - 100%
40x = 100 x 12
x = 30 total de alunos
30 - 12 meninas = 18 meninos
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x - 100%
40x = 100 x 12
x = 30 total de alunos
30 - 12 meninas = 18 meninos