The correct option is
C 10;10+5=15,5+10=15,15–5=10;15–10=5Say: Let's read the question.
Ask:
∙ What do we have to do here?
Ans: We need to identify the number of red cars, and then identify the related addition and subtraction equations for the total number of cars on the road.
Say: Let us begin by finding the number of red cars.
Ask:
∙ How many blue cars are there?
Ans:
5
∙ How many red cars are there?
Ans: Twice as many as the blue cars.
∙ How much is twice as much as 5?
Ans:
10
∙ How did we find this?
Ans: By adding 5 two times, i.e.,
5+5=10
∙ So, how many red cars are there?
Ans:
10
Say: Now let us identify the related addition and subtraction equations for the total number of cars on the road.
Ask:
∙ How many blue cars are there?
Ans:
5
∙ How many red cars are there?
Ans:
10
∙ What are the two addition equations that can be framed to find the total number of cars?
Ans:
10+5=15 and
5+10=15
∙ How do we find the difference?
Ans: By subtracting the smaller number from the bigger number.
∙ Using the same three numbers, i.e.,
5,10, and
15, what subtraction equation can be framed?
Ans:
15–5=10 and
15–10=5
Hence, Option B is correct.
WB: If required, use the whiteboard to represent the bigger number and check the smaller number as shown, and write the related addition and subtraction equations.
Probing Question:
Q. So, what are the related addition and subtraction equations that are framed?
A. Addition equations:
10+5=15 and
5+10=15
Subtraction equations:
15–5=10 and
15–10=5