In this lesson, we will explore how addition and subtraction are linked, and how a part whole relationship can produce related facts.
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This part whole model can be expressed as 7 - 3 = 4. Choose the other subtraction equation that can be written from this part whole model.
7 - 0 = 7
7 - 1 = 6
Correct answer: 7 - 4 = 3
7 - 4 = 3
Q2.
There are five elves standing up, and two elves sitting down. Altogether, there are seven elves. This can be written as an equation: 5 + 2 = 7. How else can this equation be written?
1 + 6 = 7
Correct answer: 2 + 5 = 7
2 + 5 = 7
7 = 3 + 4
Q3.
This part whole model can be expressed as 1 + 6 = 7. Choose the other addition equation that can be written from this part whole model.