Answer:
5 x 18 = 5 x 2 x 9
5 x 18 = 90
Explanation:
For the first equation, notice that 18 is broken into 9 and an unknown.
This can be written as:
18 ÷ 9 = ?
Well, 18 divided by 9 equals 2.
18 ÷ 9 = 2
We can use this to answer the second equation.
Instead of trying to multiply 5 and 18, multiply 5 and 2 first.
5 x 18 = 5 x 2 x 9
5 x 18 = 10 x 9
Now, just multiply 10 and 9.
5 x 18 = 10 x 9
5 x 18 = 90
Therefore, the product of 5 and 18 is 80.