For the past several weeks we have been learning about place value. We've been counting all year and adding straws for the days in school, bundling up the tens and then counting tens and ones. Now, we've been working more and more on making numbers using tens and ones in as many different combinations as we can.
For munchie math last week we made some numbers using veggie straws as tens and cheerios as ones. Students would take turns choosing a two digit number and then the rest of the class would make the number using their snacks.
After we made the number, we wrote it in expanded form. This is a little trickier as the students have to look at the value of their tens and ones, not just at the number. Example 33 is 3 tens and 3 ones, which equals 30+3. This has been a little confusing when the children have to figure out the value. We've had a lot of fun exaggerating when we think 30 is 30 tens instead of 3 tens. By explaining to them that that would be 300, they understand the idea of actually grouping those ones together.
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We did a lot of other fun place value activities throughout the week to help us remember and really cement this concept.
We also practiced place value at our BUILD centers this week.
We played place value "war" using playing cards with a partner. Each child took two (or three) cards and made the biggest number that they could by choosing which card should go in which place. Then the child with the biggest number got to take the other player's cards.
We also used place value dice to roll a two digit number and then write it, draw it, and expand it.
At another station the children pulled a number out of a bag and the made it using cubes.
Another fun game of place value war was played with cards that have different numbers made out in tens and ones. The children had to put down their card and read the number and tell its expanded form and then decide which player had the highest number.
These were fun ways for us to practice and the children had a ball!
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