# McGraw Hill My Math Grade 4 Chapter 11 Lesson 5 Answer Key Customary Units of Weight

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## McGraw-Hill My Math Grade 4 Answer Key Chapter 11 Lesson 5 Customary Units of Weight

The weight of an object is how heavy it is. The customary units of weight are ounce (oz), pound (lb), and ton (T).

Math in My World

Example 1

Suzie’s father bought some sugar for their favorite recipe. Which is a more reasonable unit to use for the weight of a bag of sugar, ounces or pounds?

A small packet of sugar would be weighed in ounces.
A bag of sugar is much larger and would be weighed in pounds.
So, ______________ is a reasonable unit to use for the weight of a bag of sugar.
So, pounds is a reasonable unit to use for the weight of a bag of sugar.

Example 2

Which is the most reasonable estimate for the weight of a leaf: 1 ounce, 1 pound, 1 ton, or 10 tons?

Compare the weight of a leaf to the weight of objects that you know.
A leaf weighs less than a pineapple or 1 pound.
Objects that weigh less than 1 pound are weighed in ounces. The only option that contains ounces is 1 ounce.
So, a leaf weighs about _______________.
So, a leaf weighs about 1 ounce.

Guided Practice

Choose the best estimate for the weight of each object.

Question 1.
paper airplane

(A) 4 ounces
(B) 40 ounces
(C) 4 pounds
(D) 4 tons
The given object weighs less than a 1 pound.
Objects that weigh less than 1 pound are weighed in ounces.
Therefore, option A is correct.

Question 2.
helicopter

(A) 5 ounces
(B) 500 ounces
(C) 5 tons
(D) 500 tons
The given object is much larger and would be weighed in tons.
Therefore, option C is correct.

Question 3.
rabbit

(A) 4 ounces
(B) 4 pounds
(C) 40 pounds
(D) 4 tons
The given object is much larger and would be weighed in pounds.
Therefore, option B is correct.

Talk Math

Does an object that is small always weigh less than an object that is large? Explain.

No, the object that is small always does not weigh less than an object that is large.
For example, an apple is smaller in size than a piece of paper.
But in terms of weight, an apple will weigh more than a piece of paper.

Independent Practice

Choose the best estimate for the weight of each object.

Question 4.

(A) 1 ounce
(B) 11 ounces
(C) 1 pound
(D) 1 ton
The given object weighs less than a 1 pound.
Objects that weigh less than 1 pound are weighed in ounces.
Therefore, option A is correct.

Question 5.

(A) 20 ounces
(B) 20 pounds
(C) 200 pounds
(D) 20 tons
The given object is much larger and would be weighed in pounds.
Therefore, option C is correct.

Question 6.

(A) 4 ounces
(B) 4 pounds
(C) 400 pounds
(D) 4 tons
The given object weighs less than a 1 pound.
Objects that weigh less than 1 pound are weighed in ounces.
Therefore, option A is correct.

Question 7.

(A) 3 ounces
(B) 3 pounds
(C) 300 pounds
(D) 3 tons
The given object is much larger and would be weighed in pounds.
Therefore, option D is correct.

Question 8.

(A) 2 ounces
(B) 2 pounds
(C) 20 pounds
(D) 2 tons
The given object weighs less than a 1 pound.
Objects that weigh less than 1 pound are weighed in ounces.
Therefore, option A is correct.

Question 9.

(A) 18 ounces
(B) 18 pounds
(C) 180 pounds
(D) 1 ton
The given object is much larger and would be weighed in pounds.
Therefore, option B is correct.

Question 10.
Is it more reasonable to say that a pair of shoes weighs 1 ounce, 1 pound, or 1 ton?
It is more reasonable to say that a pair of shoes weighs 1 pound.

Question 11.
Is it more reasonable to say that a pencil weighs 2 ounces, 2 pounds, or 2 tons?
It is more reasonable to say that a pencil weighs 2 ounces.

Problem Solving

Question 12.
Mathematical PRACTICE Precise Which is most reasonable for the weight of two thoroughbred horses: 1 ounce, 1 pound, or 1 ton? Explain.
The most reasonable for the weight of two thoroughbred horses will be 1 ton.
The weight of two thoroughbred horses is much larger and would be weighed in tons. As 1 ounce and 1 pound would weigh too little.

Question 13.
Using your answer from Exercise 12, what is a reasonable estimate for the weight of four thoroughbred horses? Explain.
If the weight of two thoroughbred horses is 1 ton.
Then the weight of four thoroughbred horses will be 2 tons.

Question 14.
Using your answer from Exercise 12, is it reasonable to say that a herd of eight thoroughbred horses weighs 2 tons? Explain.
No, it is not reasonable to say that a herd of eight thoroughbred horses weighs 2 tons.
Because the weight of four thoroughbred horses weighs 2 tons.

HOT Problems

Question 15.
Mathematical PRACTICE Use Math Tools Estimate the weight of three objects in your desk. Order the objects from greatest to least weight.
Let us assume the three objects as book, pencil and paper clip.
The estimated weight of a book will be 8 ounces.
The estimated weight of a pencil will be 2 ounces.
The estimated weight of a paper clip will be 1 ounce.
The order of objects from greatest to least weight will be book, pencil and paper clip.

Question 16.
Building on the Essential Question How do you estimate weight?
Weight of any object can be estimated by their capacity. Different customary units are used to measure different objects. The customary units of weight are ounce (oz), pound (lb), and ton (T).

### McGraw Hill My Math Grade 4 Chapter 11 Lesson 5 My Homework Answer Key

Practice

Choose the best estimate for the weight of each object.

Question 1.

(A) 6 ounces
(B) 6 pounds
(C) 60 pounds
(D) 6 tons
The best estimate weight for the given object will be in tons.
Therefore, option D is correct.

Question 2.

(A) 70 pounds
(B) 7 pounds
(C) 70 ounces
(D) 7 ounces
The best estimate weight for the given object will be in pounds. 70 pounds will be more,
Therefore, option B is correct.

Question 3.

(A) 20 tons
(B) 200 pounds
(C) 20 pounds
(D) 2,000 ounces
The best estimate weight for the given object will be in tons.
Therefore, option A is correct.

Question 4.

(A) 8 ounces
(B) 80 ounces
(C) 8 pounds
(D) 80 pounds
The best estimate weight for the given object will be ounces.
Therefore, option A is correct.

Draw lines to match each object to its reasonable weight.

Problem Solving

Question 10.
Mathematical PRACTICE Check for Reasonableness Jesse claims that his goldfish weighs about 4 pounds. Is Jesse’s claim reasonable? Explain.
Yes, it is reasonable to say that his goldfish weighs about 4 pounds.

Question 11.
Tasha claims that her skateboard weighs about 3 pounds. Is Tasha’s claim reasonable? Explain.
Yes, it is reasonable to say that the skateboard weighs about 3 pounds. Because the average weight of the skateboard is around 2-5 pounds.

Vocabulary Check

Question 12.
Write a definition for the term weight.
The weight of an object is how heavy it is.

Question 13.
Order the units of weight from greatest to least: pound (lb), ounce (oz), ton (T).
The order of the units of weight from greatest to least is ounce (oz), pound (lb), ton (T).

Test Practice

Question 14.
Which animal’s weight is closest to 1 pound?
(A) an ant
(B) a lion
(C) a mosquito
(D) a robin