Constructed Response Answers

ANSWER KEY

7th Grade: CONSTRUCTED RESPONSE ERB practice:


These are the instructions that will be given for this part of the ERB:

There are 8 questions in this test. For each question you must write an answer. It is important that your answer be clear and complete and that you show all of your work, since partial credit may be awarded. You may use drawings, words, or numbers to explain your answers.

In other words, be COMPLETE in your explanations. As we've been practicing in the TEST BEST booklets, you might
1. Restate what you are asked to find.
2. Show your work.
3. Show how you check your answer.

1. I'm going to choose at random one of the letters in the 7-letter word MEASURE. What letter is most likely to be chosen?

E

Explain why.
E is the most likely letter to be chosen because the probability is 2/7 for getting an E and only 1/7 for each of the other letters. You are twice as likely to get an E.

Note: Remember that probability can be expressed as a fraction or as a percent. Probability will never exceed 1.

2. A class is making puppets where the dimensions are 1/3 as big as the actual people being modeled. Find the puppet's dimensions for the example below.

Real Person Puppet
Height 5 feet ______ 20 inches or 1 ft. 8 in.
Waist 24 inches ______ 8 inches
Foot 12 inches ______ 4 inches

Remember that there are 12 inches in a foot.

Just show your math work. You could say that each 12 inches in real life will equate to 4 inches for a model.

3. Show how the number 5 can be written as the product of a fraction less than 1 and a whole number.

You pretty much have been given this problem already.



Hint: here's just one way you can show the number 8 as the product of a fraction less than 1 and a whole number: 8 = 1/2 x 16. There are many, many more ways to do this, in fact, infinitely many more ways to show 8 as a product. Another would be: 8 = 1/3 x 24 and another would be: 8 = 1/4 x 48. Get the idea?