Transcript 2.8 Adding Two Digit Numbers with Base Ten Blocks

Adding Two Digit Numbers
Base Ten Blocks
Module 2.8
Adding Two Digit Numbers
Base Ten Blocks
I need two volunteers to take a handful of tens and
ones blocks from the container to make a two-digit
number.
What happens if we put the two groups of blocks
together?
What number would the blocks show?
What addition sentence could you write?
Combine the blocks to determine the total value.
Adding Two Digit Numbers
Base Ten Blocks
On your sticky note, write a two-digit number that
has no more than 4 tens and no more than 5 ones.
Examples: 42, 31, 24
Non Examples: 52, 27, 19
Attach your sticky note to the classroom door.
Select two sticky notes, use the Flare Place Value tool
or Base Ten Blocks to find the total of the two
numbers.
Reflection
What strategies did
you use on part 2?