5th Grade Math Review

Front

What is the order of operations in math?

Back

The order of operations is a set of rules that determines the sequence in which calculations are performed. It is often remembered by the acronym PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What is the result of 30 - (6-2) x 4?

Back

14

Front

How do you add fractions with different denominators?

Back

To add fractions with different denominators, find a common denominator, convert the fractions, and then add the numerators. For example, to add ¾ and ⅙, the common denominator is 12, so ¾ becomes 9/12 and ⅙ becomes 2/12. Then, 9/12 + 2/12 = 11/12.

Front

What is the best way to estimate 3.9 + 4.7?

Back

The best way to estimate is to round the numbers to the nearest whole numbers: 3.9 rounds to 4 and 4.7 rounds to 5, so 4 + 5 = 9.

Front

How do you round a number to the nearest hundred?

Back

To round a number to the nearest hundred, look at the tens digit. If it is 5 or more, round up; if it is less than 5, round down. For example, 283 rounds to 300.

Front

What is the value of 0.5 in decimal form?

Back

0.5 is equal to 0.50, which means they represent the same value.

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number). For example, in the fraction ¾, 3 is the numerator and 4 is the denominator.

Front

How do you convert a mixed number to an improper fraction?

Back

To convert a mixed number to an improper fraction, multiply the whole number by the denominator, add the numerator, and place that result over the original denominator. For example, 2 ½ becomes (2*2 + 1)/2 = 5/2.

Front

What is the difference between a prime number and a composite number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. A composite number is a natural number greater than 1 that has more than two positive divisors.

Front

What is the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width. For example, if a rectangle has a length of 5 units and a width of 3 units, its area is 5 x 3 = 15 square units.