Carregando…
Exemplo 9.2 de Prealgebra, 9.1 Use a Problem Solving Strategy
Use a Problem Solving Strategy: exemplo 9.2
Problema e solução em inglês, como no livro original.
Yash brought apples and bananas to a picnic. The number of apples was three more than twice the number of bananas. Yash brought apples to the picnic. How many bananas did he bring?
Resolva no papel primeiro. Depois abra a solução um passo de cada vez e pare assim que conseguir terminar sozinho.
Solução
Step 1. Read the problem. Step 2. Identify what you are looking for. How many bananas did he bring? Step 3. Name what you are looking for.
Choose a variable to represent the number of bananas.Let Step 4. Translate. Restate the problem in one sentence with all the important information.
Translate into an equation.Step 5. Solve the equation. Subtract 3 from each side. Simplify. Divide each side by 2. Simplify. Step 6. Check: First, is our answer reasonable? Yes, bringing four bananas to a picnic seems reasonable. The problem says the number of apples was three more than twice the number of bananas. If there are four bananas, does that make eleven apples? Twice 4 bananas is 8. Three more than 8 is 11. Step 7. Answer the question. Yash brought 4 bananas to the picnic.
Sua vez
O Try It do livro logo depois deste exemplo: mesma ideia, outros números. Só a resposta é dada.
Guillermo bought textbooks and notebooks at the bookstore. The number of textbooks was more than the number of notebooks. He bought textbooks. How many notebooks did he buy?
Como foi?