Question

Identify the missing numbers and find the sum of $8+9$.

• A. Missing numbers: $8,8,1$; Sum: $17$
• B. Missing numbers: $8,2,2$; Sum: $18$
• C. Missing numbers: $1,6,6$; Sum: $15$
• D. Missing numbers: $2,7,7$; Sum: $17$

Answer 1

The correct option is D Missing numbers: $2,7,7$; Sum: $17$

To find the sum of $8+9$, we need to break down $9$ such that one of the numbers when added to $8$ makes a $10$. Then, we add the other number with $10$ to find the sum.


$8+9=8+2+7=10+7=17$

Therefore, the missing numbers are $2,7,7$, and the sum is $17$.

Hence, Option A is correct.