Uncategorized – Page 12 – Mr. J’s Math Class

Rounding decimals

Let’s look at rounding decimals from a different perspective. We spent some time investigating a different method of rounding.

Rounding decimals is an important skill in estimation and other parts of math. Today’s lesson reviewed how we round decimals using several techniques and reminders. Which one makes the most sense to you?

Ordering decimals

Our lesson focused on how to order decimals by size, using our skills in place value and decimal comparison.

Comparing decimals

Today’s lesson focused on how to order and compare decimals, using our skills in place value.

Representing decimals

Let’s look at four different ways of representing whole numbers and decimals: standard form, word form, expanded form, and expanded notation. How would these forms help use to understand the concepts?

Rubric for grading our notebooks

Here’s the rubric we will use for grading our notebooks.

Where did our number system come from … and why do we have “base ten”?

In today’s lesson we set up our math journals and explored the base ten system. Our guiding question concept: our system has only ten digits (0 to 9), but can represent an infinite amount of numbers. How does that work? Place value is the secret sauce. We compared our system to other number systems whichContinue reading “Where did our number system come from … and why do we have “base ten”?”

So, what are numbers anyway? 😊

Welcome to 5th Grade math! We are starting today with a review of some of the vocabulary and concepts we use in discussing our number system.