# MATH

• WELCOME TO MATH!

Today we will begin our study of Metric Units of Length.
When we studied 'inches' on our rulers last week, we could see that 12 inches next to each other equals one 'foot.'

We also saw that one side of the ruler was marked with inches, and the opposite side of the ruler was marked with a unit of measurement called centimeters (cm).

Centimeters are a METRIC unit of length.

If you place ten centimeters next to each other, that length is called a decimeter (dm).

Please open your Math textbook to page 270 where you will see an illustration of a crayon which measures about 10 cm, or 1 dm in length.

### BELOW YOU WILL FIND LINKS TO TWO VIDEOS WHICH FURTHER EXPLAIN THE METRIC UNITS OF CENTIMETERS (cm) AND DECIMETERS (dm).

Please look at questions 1 - 8 on page 270 of your textbook.
NOTE: For number 8, a cassette tape is approximately as long as a crayon.

I am listing here the answers to those questions. You should compare your answers to the ones written here to be sure they agree. (If they don't agree, we need to figure out why.)

1. cm
2. dm
3. cm
4. cm
5. a.) 1 cm
6. b.) 3 dm
7. a.) 3 cm
8. c.) 1 dm