Question

Qual das alternativas representa a Multi multiplicação de números racionais 5/4 X 8/2

A) ( ) 40/8
B) ( ) 40/2
C) ( ) 8/40
D) ( ) 5/40
​

Answer 1

Resposta:

$a) \frac{40}{8}$

Explicação passo-a-passo:

$\frac{5}{4} \times \frac{8}{2} = \frac{5 \times 8}{4 \times 2} = \frac{40}{8}$

Answer 2

Resposta:

$\:\:\:\:\:\: \pink h\pink o\pink o\blue i\blue l\blue \: \green v\green a\green m\green o\green s\green \: \orange l\orange á\orange .\green .\green .\green \:$

Explicação passo-a-passo:

$\tt \: calculando \:na \: ordem : \\ \rm temos : \\ alternativa \: a \: como \: resposta \: . \\ \\ 1 \frac{1}{4} \times \frac{8}{2} = 1 \frac{1}{4} \times 4 = \\ \\ \frac{5}{4} \times 4 = \frac{20}{4} = 5 \: \\ \\ \rm repare \: que \: se \: procurarmos \: o \: \\ \rm \: dobro \: de \: \frac{20}{4} \\ \\ teremos \: a \: resposta \: ingual \: a \: \\ \\ \frac{20}{4} = \frac{40}{8} \\ \\ \rm \: no \: qual \: obtemos \: a \: alternativa \: \\ a \: como \: resposta \: correta \:.$

$\\ \\ \\ \\ \:\:\:\:\:\:\: \green e\green s\green p\green e\green r\green o\green \: \pink t\pink e\pink r\pink \: \orange a\orange j\orange u\orange d\orange a\orange d\orange o\orange \: \purple . \\ \\ \\ \:\:\: \blue b\blue o\blue n\blue s\blue \: \red e\red s\red t\red u\red d\red o\red s\red \: \green .$$\\ \\ \\ \:\:\:\: \green a\blue s\pink s\orange : \blue m\blue \alpha\blue r\blue c\blue o\: \red d\red i\red \alpha\red z\:\pink t\pink r\pink \gamma\orange s\orange t\orange \gamma\: \blue .$