Number Lines

On our quest to create more efficient problem solving strategies, we discovered how to use a new math tool this week: the number line.  When working on an addition story problem, Joey  figured out that if he started at one number, he could count on, hopping number-by-number along the line.  After he taught this counting on strategy to the class, other students realized that they could do the opposite to count backwards to solve subtraction problems.  Try it out in your homework!

photo (25)
B’s “Opposite Counting Backwards Strategy.”
photo (27)
Jener’s Cross-Out Backwards Strategy
photo (26)
Nico explains how he used the counting backwards strategy.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s