Identifying Subtraction Sentences
It’s time to watch a video about solving subtraction sentences using pictures.
Goal:
Goal:
Learn!
Goal: Do you understand how to match a picture with a subtraction sentence?
It is helpful to look at a picture when finding the difference in subtraction sentences. Pictures help us understand the whole and the part being taken away. Click on the video below to help the engineers take away windows from rockets. Remember to ask yourself: What do I know? What is the whole? What is the part?
This machine was busy building rockets all night, but there was a glitch in the system! Some of the rockets have too many windows. Can you help the engineers find the rockets with too many windows?
The first rocket we need to fix had 6 windows installed and the engineers need to remove 5 of them. When the engineers are done, the rocket will only have 1 window. This is just like the subtraction sentence 6-5=1. Can you find the rocket that matches this subtraction sentence?
Very good! This rocket has 6 windows and 5 of them are crossed out. This shows the subtraction sentence 6-5=1.
The second rocket we need to fix had 12 windows installed, but it only needed 3 windows. The engineers will take out 9 of the windows. This is the subtraction sentence 12-9=3. Can you help find the rocket showing this subtraction sentence?
There it is! This rocket has 12 windows and 9 of them are crossed out. This shows the subtraction sentence 12-9=3.
The third rocket we need to fix had 14 windows installed and the engineers will need to remove 8 of them. When the engineers are done, the rocket will only have 6 windows left. What subtraction sentence will help us find this rocket? That’s right! 14-6=8.
Do you see the rocket showing 14-6=8? Great job! This rocket has 14 windows and 6 of them are crossed out. That means 8 of the windows will stay on the rocket. Great job!
The fourth rocket we need to fix had 20 windows installed, but it only needs 3. The engineers will remove 17 of the windows. What subtraction sentence will help us find this rocket? That’s right! 20-17=3.
Do you see the rocket showing 20-17=3? You are correct! This rocket has 20 windows and 17 of them are crossed out. That means 3 of the windows will stay on the rocket. Great job!
Now the engineers can fix these rockets and send them off to space!
Thank you for helping them match the correct rockets with the subtraction sentences!
Question
You have already discovered that this picture represents a subtraction sentence. We know that the whole is 7. What is the part that is being taken away?
7 - ? = 4