# Texas Go Math Grade 1 Lesson 17.4 Answer Key Explore Length

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## Texas Go Math Grade 1 Lesson 17.4 Answer Key Explore Length

Unlock the Problem

April measures the length of her book with 2 different units.
She uses and .
Which measurement uses the greater number of units?

Each and is a unit.
measurement uses the greater number of units than .

Explanation:
takes more number of measurement than because size differs among them both.

What information am I given?
Measure the book using and .

Plan
What is my plan or strategy?
I can __________.

Solve
how how you solve the problem.
__________
__________

Explanation:
Measure the book with .
=> Length of the book = 5 .
Measure the book with .
=> Length of the book = 1 .

Try Another Problem
Solve. Draw or write to explain.

Question 1.
Choose two different measuring tools to measure the distance from your desk to the wall. Draw the units, and write how many of each unit you used to measure. How are the measurements different?

Explanation:
Length between my desk and the wall = 3 .
Length between my desk and the wall =  less than 1 .

Question 2.
Choose two different measuring tools to measure a folder. Draw a picture to show each measurement, and explain why they are different.

Explanation:
Length of the folder = 5 .
Length of the folder = 1 .

Math Talk
Mathematical Processes
Why does it take fewer of a unit to measure an object? Explain.
It takes fewer of a unit to measure an object because smaller objects makes errors.

Explanation:
Measurement is a process that uses numbers to describe a physical quantity… use smaller units of measurement to measure small things with less error.

Share and Show
Solve. Draw or write to explain.
Question 3.
The bookmark is about 2 long. Mark measures the same bookmark and finds it is 8 long. Explain why Mark’s measurement uses more units.
Mark’s measurement uses more units because less in length than .

Explanation:
The bookmark is about 2 long.
Mark measures the same bookmark and finds it is 8 long.

Problem Solving
Question 4.
H.O.T. Multi-Step Erica chose  to measure an eraser. Allan chose to measure the same eraser. Which unit would you choose? Explain.

I would choose because its length is big and its easy to measure the eraser.

Explanation:
Erica chose  to measure an eraser.
Allan chose to measure the same eraser.

Use real objects. Choose the correct answer.
Question 5.
Justify Grace measures the table with and . She uses more than . Which describes why she uses more
(A) the is the same length as the
(B) the is shorter than the
(C) the is longer than the
(C) the is longer than the

Explanation:
Justify Grace measures the table with and . She uses more than .
=> has to be more than .

Question 6.
Roger measures his baseball bat using a and a . He uses more . Which describes how the measurements are different?
(A) the is shorter so he needs more than than
(B) the is the same length so he needs the same number of
(C) the is longer so he needs fewer than
(A) the is shorter so he needs more than than

Explanation:
Roger measures his baseball bat using a and a c. He uses more .
=> is smaller in size than .

Question 7.
Texas Test Prep Which shows the correct way to measure a desk using two units of different length?

Explanation:
The correct way to measure a desk using two units of different length:
=> Two different measuring units.

TAKE HOME ACTIVITY • Have your child measure an object with paper clips and then with craft sticks. Ask him or her why more paper clips were used to measure the object.
Why more paper clips were used to measure the object because the size of the paper clips is smaller than the size of craft sticks.

Explanation:
Because the size of the paper clips is smaller than the size of craft sticks.

### Texas Go Math Grade 1 Lesson 17.4 Homework and Practice Answer Key

Draw or write to explain.
Question 1.
Ella measures a book. It is about 9 long. Sam measures the same book and finds it is 3 long. Explain why Sam’s measurement is fewer units.
Sam’s measurement is fewer units because the size of the is smaller than the size of .

Explanation:
Ella measures a book. It is about 9 long. Sam measures the same book and finds it is 3 long.

Problem Solving
Question 2.
Nate chose a to measure the length of a crayon. Mara chose to measure the length of a crayon. Which unit would you choose? Explain.
I would like to choose because its big in size and its going to be easy for  measurement.

Explanation:
Nate chose a to measure the length of a crayon. Mara chose to measure the length of a crayon.
=> I would like to choose because its big in size and its going to be easy for  measurement.

Lesson Check
Question 3.
Faith measures the beach towel with and . She uses fewer than . Which describes why she uses fewer ?
(A) the and the are the same length.
(B) the is longer than the .
(C) the is longer than the .
(B) the is longer than the .

Explanation:
Faith measures the beach towel with and . She uses fewer than .
The is longer than the that’s why she uses fewer .

Question 4.
Danielle measures her dog leash using a and a . She uses fewer . Which describes how the measurements are different?
(A) the is longer so she needs fewer than .
(B) the is shorter so she needs more than .
(C) the is the same length as the , so she needs the same number.
(A) the is longer so she needs fewer than .

Explanation:
Danielle measures her dog leash using a and a . She uses fewer .
=> is smaller in size than .

Question 5.
Choose two different measuring tools to measure the length of an object. Draw the object. Draw to show how many of each measuring tool below the object. Describe how and why the measurements are different.