Math 10-3

Unit 4 Mass, Temperature, and Volume

Lesson number 43 Mass in the Système International

Formula page

I expect that you will be able to use a formula page for this class,  but that will be determined by your teacher.

Your teacher may have a formula page they expect you to use.

Below is a link to the formula page I will use (at least for now!) when I’m doing questions for this class.

This may change, depending on feedback from your teacher.

I encourage you to download this page and print it so you have it handy when you are doing math.

LINK
https://drive.google.com/open?id=1EMauePx-P6WrtTIcd7-AtNnmJt8zqXpI

Referents

There are many good referents to use to determine reasonable lengths and weights.

I found this one at the Learn Alberta website

For THIS lesson,  the referents for 1 gram and 1 kilogram will be helpful.

Explore the Math Pages 154 - 155

Read/Work through this section of your textbook.
These ideas will be developed in the examples

Your teacher will let you know which pages you need to do for this lesson.

Example 1  Pages 155 - 156

Read the example problem and try to answer the question YOURSELF if you can.
Use the textbook solution or the Video Tutorial if you need help.

Video Tutorial

Mental Math and Estimation   Page 158

Do your best to use mathematics in your head to solve this problem.
Use the Video Tutorial to check your answer or get help with the problem.

Video Tutorial

Build Your SkillsPages 158 - 160

These questions all come from your textbook.

If you need extra practice or want to maintain your skills,  see the NEXT section for more practice questions.

Doing Practice Problems

The problems in this section reinforce the math presented in this lesson, and give you opportunities to build on and practice your skills.

•	Work through the practice problems for this lesson.
	These problems are for practice, you don’t need to hand them in!
	(your teacher may assign specific questions for you to complete)

•	Use the answers in the back of the book to CHECK YOUR WORK!

•	If you make a mistake, TRY TO FIX IT!

•	If you need help or want more information, view the video solutions provided.

•	If you still need more help,  CONTACT YOUR TEACHER!

•	EXTEND YOUR THINKING problems will be more challenging than the others.

Notes

Question 6,    I didn’t do a video for this one.
A fine question, but very subjective.

Question 7,    I didn’t do a video for this one.
Did the textbook tell us how big a sheet of drywall is....?

Question 8,    I didn’t do a video for this one.
Depending on your knowledge of planets...
Jupiter is the largest planet, so you would weight the MOST on Jupiter
Mercury is the smallest planet, so you would weight the LEAST on Mercury
But,  your mass would be the same no matter where you are.

Video Solution Links

Check your work for every problem you do!
If you make a mistake,  try to fix it!
Use the video solutions for more information.
If a problem still doesn’t make sense, ASK YOUR TEACHER FOR HELP!

({{"Question 1", "Question 2", "Question 3", "Question 4", "Question 5"}})

Develop and Maintain Your Skills

Doing these problems

These questions are provided to help you develop and maintain your skills with the ideas of this lesson.

These questions are modelled after the questions in the textbook,  so there is nothing different here, just more questions if you need them.

These questions are completely optional (unless your teacher specifically assigns them)

Each question has an answer AND a video solution.

DO your best to answer the question YOURSELF first!

Check your work with the answer provided.

If you make a mistake,  try to fix it!

Use the video solutions for more information.

If a problem still doesn't make sense, ASK YOUR TEACHER FOR HELP!

Practice Problems

Problem

A recipe for cornbread calls for 120 g of flour, 170 g of cornmeal, and 50 g of sugar.

If you double the recipe, what is the total weight of the dry ingredients?

Answer

There are 680 g of dry ingredients in the doubled recipe.

Video Solution Link

Problem

What is the total weight of a loaded truck if the truck weighs 2.6 tonnes and it is loaded with 15 skids of boxes that weigh 210 kilograms each?

Give your answer in tonnes.

Answer

The total mass of the loaded truck is 5.75 tonnes.

Video Solution Link

Problem

Irène needs 1.6 kg of tomatoes to make her grandmother’s recipe for ratatouille.

She has baskets of tomatoes that weigh 256 g, 452 g, 158 g, and 320 g.

How many more grams of tomatoes does she need?

Answer

Irène needs 414 g more tomatoes.

Video Solution Link

Problem

Lorinda is baking apple pies.

According to her recipe, she needs 6 pounds of apples.

The bag of apples she bought only shows the weight in kilograms.

How many kilograms of apples does she need?

Answer

Lorinda needs 2.7 kg of apples

Video Solution Link

Problem

A recipe calls for 180 g of flour.

How much is this in ounces?

Answer

180 g equals about 6.3 oz.
that depends on which conversion factor you use
180 g = 7.2 oz using the other conversion factor

Video Solution Link

Problem

A baby weighed 7 pounds 12 ounces at birth.

How much did it weigh in grams?

Answer

The baby has a mass of about 3522.4 g.
or...  The baby has a mass of about 3487.5 g
it depends on which conversion factor you use.

Video Solution Link

Problem

The cost of bananas is $0.49/lb at one store, but you see an advertisement for bananas on sale at another store for $1.05/kg.

Which is the better buy?  (support your answer with calculations)

Answer

One kilogram of bananas at the first store costs about $1.09. 
The sale at the second store is a better buy.

Video Solution Link