Question

The numbers 32 and 12 are each rounded to the nearest ten and then multiplied to estimate the product. What is the best estimate of 32 × 12 based on this method?

Answer 1

`beinggreat78~here~to~help.`

So the method is clearly stating that we need to round to the nearest ten, so let's round using the rule set.

• If the number is below 5, round down.

• If the number is 5, round up.

• If the number is above 5, also round up.

This array should help you vision the sequence better.

⇒
`\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]`

Now, using the rounding ruleset, we have to find what to round to. Since 32 and 12 both have a ones digit below 5, we round down, meaning we now have 30 and 10. The last step is to multiply 30 by 10 to get your estimate.

`30`

`*~10`

▬▬

`300`

With this information, your answer is 300(rounded to nearest ten)!

Answer 2

300

Explanation:

32 rounds to 30.

12 rounds to 10.

30 × 10 = 300

Answer: 300