Question

Measuring Up New York State Practice Test 2

Answer 1

Answer:

      $1\times 10^3\div 50 =1,000\div 50=20$

      $1\times 10^3\div 20 =1,000\div 20=50$

Explanation:

Let's recreate what Sara might have done:

• A four-digit number: 1,000 = 1 × 10³

• A two-digit number: 10

• Quotient (division):

                                           

        $1\times 10^3\div 10=10^2=100$

Then, the quotient is a three-digit number.

Is this enough evidence to assert that the quotient of a four-digit number and a two-digit number is alwasys a three-digit number?

No, it is not.

Here, two examples to show that is not correct:

      $1\times 10^3\div 50 =1,000\div 50=20$

      $1\times 10^3\div 20 =1,000\div 20=50$

• Both 20 and 50 are two-digit numbers.