Question

A cookie jar has $3$ butter cookies and $13$ chocolate chip cookies. How many cookies are there in total?

• A. $16$
• B. $13$
• C. $17$
• D. $4$

Answer 1

The correct option is A $16$

If we add $13$ and $3$ we will get a total of $16$, i.e., $13+3=16$.
$13$ has $1$ Ten and $3$ Ones, while $3$ has $0$ Tens and $3$ Ones.
Add the Tens and Ones.

	T	O	Tens	Ones
	$1$	$3$
+		$3$
	$1$	$6$

Thus, our final answer has $1$ Ten and $6$ Ones, which is the number $16$.
$16$ can be represented by $1$ rod and $6$ units.

There are $16$ cookies in all.