Mrs. Vos's Owl Room Blog

Greetings, Owl Families!

We have started our new math unit this week!  In this unit, the first graders will be learning about place value and numbers to 100.  We began counting by tens: 10, 20, 30, 40 and so on.  We used a 10 x 10 grid to help them see the relationship between the tens digit in a decade number and the number of tens it has. (See picture below).

The first graders then linked 2-digit numbers to tens and extra ones.  This we we focused on teen numbers; i.e.: 15 is 1 ten and 5 ones.  Soon they will learn that a 2-digit number, like 46, is made up of tens and ones also, such as 40 and 6.  Next, the students will use what they know about adding 1-digit numbers to add 2-digit numbers.  For example, 3 + 4 = 7, so 30 + 40 = 70.

Finally, they will learn to regroup and count on to find a total.  See the example picture below.