Question

Out of a total of $8$ boxes of cereal, $2$ boxes have cornflakes and $6$ boxes have muesli. Which of the following options have two equations of the fact family that can be created?

• A. $8+2=10$ and $10–8=2$
• B. $4+4=8$ and $8–4=4$
• C. $2+8=10$ and $8–6=2$
• D. $2+6=8$ and $8–2=6$

Answer 1

The correct option is D $2+6=8$ and $8–2=6$

Say: Let's read the question.

Ask:
$\bullet$ What do we have to do here?
Ans: We have to frame two addition and subtraction equations for the total number of cereal boxes.
$\bullet$ How many boxes of cereal are there in total?
Ans: $8$
$\bullet$ How many boxes have cornflakes?
Ans: $2$
$\bullet$ How many boxes have muesli?
Ans: $6$
$\bullet$ How do we find the total?
Ans: By adding two smaller numbers to get a bigger number.
$\bullet$ Using the three numbers, i.e., $2,6,$ and $8$, what addition equations can be framed?
Ans: $6+2=8$ and $2+6=8$
$\bullet$ How do we find the difference?
Ans: By subtracting the smaller number from the bigger number.
$\bullet$ Using the three numbers, i.e., $2,6,$ and $8$, what subtraction equations can be framed?
Ans: $8–6=2$ and $8–2=6$
$\bullet$ From the given options, which equations are used?
Ans: $2+6=8$ and $8–2=6$

Hence, Option D is correct.

WB: Use the whiteboard to represent the bigger number and check the smaller number as shown, and write the addition and subtraction equations.

Probing Question:
What other addition and subtraction equations can be framed?
A. Addition equation: $6+2=8$
Subtraction equation: $8–6=2$