Students count the value of the Base 10 Blocks (Tens and Ones) used to form letters. They add the value of the Tens and Ones for the letter’s total. Many teachers have their students do a similar activity – form their initials with actual Base 10 Blocks and count the value of the letters.
The letters are 3 to a page. Two letters on each page have the same value, but with different numbers of Tens and Ones. Students are asked to identify which letters have the same value. This is a precursor to regrouping, though that term is not used. Students see that 3 Tens and 4 Ones are identical in value to 2 Tens and 14 Ones.
The second set of pages repeat the activity with polygons and a circle made from images of Base 10 Blocks.
Common Core Standards:
1.NBT.2 “Understand that the two digits of a two-digit number represent amounts of tens and ones.”
Level: Grades K-2
Duration: 13 pages – 2-4 days
Answer Key: included
A Smart Notebook 10 file is also included. Double-click on the .zip icon and you can open the PDF and Notebook files separately.