Lesson: Subtraction Strategies within 20: Breaking Apart
In this lesson, we will learn how to subtract one-digit numbers from teen numbers by first subtracting the ones to make ten and then subtracting the remaining amount.
Sample Question Videos
Worksheet: 17 Questions • 3 Videos
We can make 10 to help us subtract.
Fill in all the missing numbers.
Adam started with 16.
He took away 6 to make 10, then took away 2 more.
Pick a calculation that is the same as what Adam did.
Look at how Daniel made 10 to help him subtract.
Use his method to find the answer.
Help him finish this new calculation.
What should he do next to find ?
Find the answer.