Question

Out of $9$ toys, $6$ are slinkys and the remaining are super balls. Which of the following options shows the correct equations that can be created to form the fact family of the numbers $6,9$, and the number of super balls?

• A. $6+9=15,9+6=15,9–6=2,9–2=6$
• B. $5+4=9,4+5=8,8–4=4,8–2=6$
• C. $6+3=9,3+6=9,9–3=6,9–6=3$
• D. $9+3=6,2+5=7,3–6=9,7–5=2$

Answer 1

The correct option is C $6+3=9,3+6=9,9–3=6,9–6=3$

To find the number of super balls using a number frame, we will first place $6$ counters for the slinkys and then count forward up to $9$, i.e., the total number of toys. We find that there are $3$ super balls, and the equation framed is $6+3=9$.


And if we place $3$ first and $6$ later, the total counters will still be $9$.
$3+6=9$


On a number frame, if we place $9$ counters first and remove $3$ later, the counters left will be $6$.
$9–3=6$



And if we place $9$ first and remove $6$ later, the counters left will be $3$.
$9–6=3$