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Read the word problem below.

Antonio has a total of 55 marbles. He has 15 green marbles and 12 red marbles. The rest of the marbles are blue. How many blue marbles does he have?

A student solves this problem by writing an equation. Which strategy could help check the student’s answer?

User Mordhak
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2 Answers

5 votes
he has 28 blue marbles 15+12-55=28
User Hair Raisin
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2 votes

Answer:

There are 28 blue marbles.

Explanation:

Antonio has 15 green marbles and 12 red marbles. The rest of the marbles are blue.

Let the number of blue marbles be x

Total marbles green plus red =
15+12=27

Now, Antonio has a total of 55 marbles.

Equation forms:


55=x+27

We will subtract 27 from 55 to get x.

=
55-27=x

Hence x = 28

Therefore, there are 28 blue marbles.

User The KNVB
by
8.9k points

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