brenna is buying 4.25 feet of ribbon for $1.95 a foot. she determines the product of the two numbers to determine the actual cost of the length of ribbon. which expression will result in the best estimate for brenna to use to check her multiplication?

4 x 1
4 x 2
5 x 1
5 x 2

Question

brenna is buying 4.25 feet of ribbon for $1.95 a foot. she determines the product of the two numbers to determine the actual cost of the length of ribbon. which expression will result in the best estimate for brenna to use to check her multiplication?

4 x 1
4 x 2
5 x 1
5 x 2

Accepted Answer

{ "quality": "clear", "question_count": 1, "skills_matched": [ "step_cot", "multiple_choice_formatter", "explain_then_answer", "tutor", "mastery_adaptive_brevity" ], "needs_drawing": false, "concepts_used": [ "Estimation", "Rounding Decimals" ], "new_concepts": [], "current_concepts": [ "Estimation", "Rounding Decimals", "Decimal Multiplication" ] } ## Identify the values to round Using the **Rounding Decimals** knowledge point $$ \begin{aligned} &\text{Length of ribbon} = 4.25\text{ feet}\ &\text{Cost per foot} = \$1.95 \end{aligned} $$ ## Round the length of ribbon Using the **Rounding Decimals** knowledge point $$ \begin{aligned} &4.25 \approx 4\text{ (rounded to the nearest whole number)} \end{aligned} $$ ## Round the cost per foot Using the **Rounding Decimals** knowledge point $$ \begin{aligned} &1.95 \approx 2\text{ (rounded to the nearest whole number)} \end{aligned} $$ ## Formulate the estimation expression Using the **Estimation** knowledge point $$ \begin{aligned} &\text{Estimated Cost} = 4 \times 2 \end{aligned} $$

$4 \times 1$

$4 \times 2$

$5 \times 1$

$5 \times 2$

{ "subject": "Mathematics", "question_type": "Multiple Choice", "knowledge_point": [ "Mathematics", "Algebra", "Rounding Decimals" ] }

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QUESTION IMAGE

Question

Explanation:

Identify the values to round

Round the length of ribbon

Round the cost per foot

Formulate the estimation expression

Answer: