A ratio is tool for comparing two quantities of the SAME things

It tells you how much of one thing there is compared to another thing.

Today, we're going to relate factors and multiples to ratios.

Ratios show up in many places in real life: morning oatmeal 2 parts water to 1 part oats; cinnamon roll recipe calls for 15 cups of flour to 3 cups of milk

Scale up: want to make oatmeal for MORE than just my family

Scale down: want to make LESS, so we don't have so much left over

Now that you know how a ratio table works (how all the ratios are connected), let's look at a ratio table with missing numbers.

#1 Can't figure it out? Don't see a pattern? Add a row and scale down

#2 You can always scale down, scale up or vice versa

1. CYUqs:

You are all going to do some of these. But, there are three things for you to keep in mind. First, do your own. Second, you choose where to start. Third, check your work with the students around you, and if you need help, get help. And if someone needs help, give help.

Check answers to make sure you are understanding:

2. Be sure that your notes are your notes are up to date:

3. Stuck? Choose to persevere: review your thinking, try different approaches, ask for help, search

Before discussing the GCF and LCM problems, turn to your elbow partner and tell them which one is the smaller and which one is the bigger: factors or multiples.

When you are in agreement, show each other at least one LCM and one GCF problem from yesterday that you answered correctly.

Discuss any problems that were challenging.