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Question

There are 3 red-colored chalks and 5 blue-colored chalks. If 85=3 is one of the equations from the fact family of the numbers 3,5, and 8, what are the remaining three equations that can be formed?

A
3+8=5,8+3=5,58=3
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B
7+1=8,1+7=8,81=7
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C
83=5,3+5=8,5+3=8
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D
6+2=8,2+6=8,86=2
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Solution

The correct option is C 83=5,3+5=8,5+3=8
Say: Let us read the question.

Ask:
What is the equation to find the total number of chalks?
Ans: 3+5=8
How else can you frame the addition equation?
Ans: 5+3=8
What is the given subtraction equation?
Ans: 85=3
What will be the other subtraction equation that can be formed using these 3 numbers?
Ans: 83=5

Hence, option C is the correct answer.

WB: Use the whiteboard to draw the number frame and write the equations.

Probing Question:
If we subtract 3 from 8, the framed equation will not be a part of the fact family, because the difference will not be 5. Is this true? Why?
A: No, because 85=3, so if we subtract 3 from 8 we will always get 5 as the difference because 3 and 5 together make 8.

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