## Monday, February 4, 2013

### Monday Math Freebie - More or Less "I Have, Who Has?" Cards

My class is studying number sense and place value right now. To get them thinking about what this looks like I created a set of "I Have, Who Has?" cards for working on understanding tens and ones, as well as what happens when you add tens or ones to a number.

Included in this file you’ll find 4 different sets of “I Have, Who Has?” Cards for working on the following concepts:
• one more/one less
• two more/two less
• ten more/ten less
Each set contains 24 cards. You’ll find the following formats on the card sets:
• Base-10 blocks
• Tally marks
• Expanded notation
• Standard form
Here's what they look like.
These cards were designed to meet the following Common Core Standards for Math:
• 1.NBT.2 - Understand that the two digits of a two-digit number represent amounts of tens and ones.
• 1.NBT.4 - Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10.
• 1.NBT.5 - Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

I hope you get a chance to use this in your home or classroom. Please let me know if you try this and how your kids like it.