Math Problem Solving Flashcard

Front

In which situation is an exact number, rather than an estimate, needed?

Back

Your score on a math test.

Front

Tyler buys 1 5/6 pounds of berries. He uses 3/7 pound to make muffins. Which estimate could help you determine about how many pounds of berries Tyler has left over?

Back

5/6 - 3/7 ≈ 2 - 1/2 = 1 1/2 pounds.

Front

Mr. Márquez had 123 eggs in a refrigerator in his restaurant. He put 32 more cartons of eggs in the refrigerator. Each carton contained 18 eggs. What is the best estimate of the number of eggs Mr. Márquez now has in his refrigerator?

Back

400.

Front

An airplane flies at a constant rate of 750 mph. How far can the plane travel in 5.5 hours?

Back

4125 miles.

Front

Which of the following statements is NOT true? All whole numbers are integers, All natural numbers are whole numbers, All integers are whole numbers, All fractions of the form p/q, where p and q are integers and q does not equal 0, are rational numbers.

Back

All integers are whole numbers.

Front

What is an exact number?

Back

An exact number is a value that is counted or measured without any uncertainty, such as the number of students in a classroom.

Front

What is an estimate?

Back

An estimate is an approximate calculation or judgment regarding a quantity or value.

Front

How do you subtract fractions with different denominators?

Back

Find a common denominator, convert the fractions, and then subtract the numerators.

Front

What is the formula to calculate distance?

Back

Distance = Speed × Time.

Front

What are whole numbers?

Back

Whole numbers are non-negative integers, including zero (0, 1, 2, 3, ...).