A Day at the Beach (Counting in Groups)

Instead of counting objects one by

Instead of counting objects one by one, we can count them in groups. For example, if we have 25 shells, we can make groups of 10 shells each and count

Every two

Every two-digit number can be broken into tens and ones. For example, 43 means 4 tens (40) and 3 ones (3). We use ten strips to represent tens and uni

In a two

In a two-digit number, the position of each digit matters. The left digit shows how many tens, and the right digit shows how many ones. In the number

We can compare two

We can compare two-digit numbers to find which is larger or smaller. For example, 72 is more than 27 because 7 tens is greater than 2 tens. We use wor

To make the largest two

To make the largest two-digit number, we put the biggest digit in the tens place. To make the smallest, we put the smallest non-zero digit in the tens