Question

The difference between two numbers is $8$. If the larger of the two numbers is $19$, what is the smaller number? Frame the subtraction equation.

• A. Smaller number: $8;19–8=11$
• B. Smaller number: $11;19–8=11$
• C. Smaller number: $12;19–12=8$
• D. Smaller number: $11;19–11=8$

Answer 1

The correct option is D Smaller number: $11;19–11=8$

Say: Let's read the question.

Ask:
$\bullet$ What do we have to do here?
Ans: We need to find the smaller number of a subtraction equation.
$\bullet$ What is given here?
Ans: The bigger number and the difference.
$\bullet$ What subtraction equation can be framed using these numbers?
Ans: $19–$ __ $=8$

Say: Let us use subtraction to find the missing number in the equation.

Ask:
$\bullet$ What related subtraction equation can be framed using the same numbers?
Ans: $19–8=$ __
$\bullet$ What is the difference when you subtract 8 from 19?
And: $11$
$\bullet$ So what is the missing number from the equation we framed based on the question?
Ans: $11$
$\bullet$ What is the completed equation that will be framed?
Ans: $19–11=8$

Hence, Option D is correct.

WB: If required, use the whiteboard to represent the bigger number and cross out the smaller number as shown, and write the subtraction equation.