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Erica is playing Target One Fractions. She has these cards: 1,2,3,4,6.
a. Which three cards should she choose to make a whole number and a fraction that have a product close to 1?

b. Write an expression for the problem Erica will solve.

c. Solve the problem.

d. What is Erica's score for this round?

1 Answer

2 votes

Answer:

a. 2, 3, 6

b. a/b × c = 1

c. a = 2, b = 6, c = 3 or a = 3, b = 6, c = 2

Explanation:

Apparently, Erica wants to multiply a fraction by a whole number to get a result of 1. That means the fraction is the multiplicative inverse of the whole number.

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a.

There is only one set of three unique numbers among those given such that one of them is a composite number with the other two as factors. Erica must choose 2, 3, and 6.

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b.

If the three numbers are represented by a, b, c, Erica wants ...

a/b × c = 1

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c.

Multiplying the equation by b gives ...

ac = b

Among the numbers 1–6, only 2×3 = 6 will satisfy this equation. Erica can choose either of ...

a = 2, b = 6, c = 3 ⇒ (2/6)×3 = 1

a = 3, b = 6, c = 2 ⇒ (3/6)×2 = 1

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d.

No scoring information is provided.

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