Lesson: Subtracting Ones from Teen Numbers: Subtracting From Ten Mathematics • 1st Grade

In this lesson, we will learn how to subtract a one-digit number from a teen number by subtracting from ten.

Lesson Plan

Students will be able to

subtract a one-digit number from a teen number by breaking apart the teen number model calculations with ten frames,
write number sentences for each step of the calculation.

Q1:

Which addition expression is equal to ?

Q2:

Think about taking away 9 from different numbers.

For example, the pictures show that 10 take away 9 is 1 and 11 take away 9 is .

Look at these number sentences. Which one is WRONG?

Q3:

Let us try to find 13 take away 9.

We can draw 13 dots as one group of 10 dots and one group of 3 dots.