# MATH

• WELCOME TO MATH!

As a review of what we learned yesterday regarding grams (g) and kilograms (kg), here is a link to Kahn Academy, which does a nice job of teaching these two measurements of mass.
You may find this site helpful :)

• To complete today's math work, you will very likely need to refer to charts which tell you how many cups are in a pint; how many pints are in a quart; how many decimeters are in a meter, etc.
It is perfectly okay to refer to charts to help us, especially because so many of these units of measurement are new to us.
YOUR MATH TEXTBOOK AND WORKBOOK SUPPLY YOU WITH THE NECESSARY CHARTS.
Over time, you will work further with measurement in both U.S. and metric units, and it will all fall into place.
Again, for now, it is A-OK to refer to a chart :)

In order to compare two different units of measure, in this example inches and feet, you would need to put them both in the same unit. To speak of them both in the same unit, you will need to rename one.

### Which is longer, 2 feet or 23 inches? I am not totally certain how long 23 inches is, but I would know if it was more or less than two feet if I renamed the feet to inches. Then I would be able to compare inches to inches instead of feet to inches. So, I will think about how many inches are in a foot: 12 This problem I'm trying to solve refers to two feet, so I need to multiply the 12 inches by 2. This = 24. Now I know that 2 feet = 24 inches, and I can answer the question. 2 ft. = 24 inches, so 2 ft. is longer than 23 inches.

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On page 280, your textbook explains how to rename a larger unit of measure to a smaller one (which is what we did above when we changed feet to inches).
We multiply. (EX: 2 ft. X 12 inches = 24 inches)

When we want to rename a smaller unit to a larger unit (like renaming inches to feet or yards), we do the opposite ... we divide.

### 36 inches = 3 feet

NEXT: Let's practice with number 1 - 9 on page 280.
Please figure out the answers and then check them against what I have written below.

1. 10 ÷ 2 = 5; 5 pt
2. 4 X 10 = 40; 40 dm
3. 7 X 2 = 14; 14 pt
4. 4 X 3 = 12; 12 ft
5. 20 ÷ 10 = 2; 2 dm
6. 16 ÷ 4 = 4; 4 gal
7. 90 ÷ 10 = 9; 9 m
8. 9 X 2 = 18; 18 c
9. 5 X 10 = 50; 50 cm