Question

find the rule and complete the table.
in out
6 54
63
8 72
9 81
10 90
11

Explanation:

Step1: Identify the rule

By observing the given pairs (6, 54), (8, 72), (9, 81), (10, 90), we can see that the rule is to multiply the "In" number by 9. That is, if the "In" number is $x$, the "Out" number is $9x$.

Step2: Find the missing "In" number

We know the "Out" number is 63. Using the rule $9x = 63$, we solve for $x$ by dividing both sides of the equation by 9. So $x=\frac{63}{9}=7$.

Step3: Find the missing "Out" number

The "In" number is 11. Using the rule $y = 9x$, substituting $x = 11$, we get $y=9\times11 = 99$.

Answer:

The missing "In" number is 7 and the missing "Out" number is 99.