Math DCP #2 Review

Front

What is multiplication?

Back

Multiplication is a mathematical operation that represents the repeated addition of a number. For example, 3 x 4 means adding 3 four times (3 + 3 + 3 + 3 = 12).

Front

What is division?

Back

Division is the process of splitting a number into equal parts. For example, 12 ÷ 3 means dividing 12 into 3 equal parts, which equals 4.

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 over the original denominator. For example, 2 1/2 = (2*2 + 1)/2 = 5/2.

Front

What is the formula to find the remaining amount after subtraction?

Back

Remaining Amount = Original Amount - Amount Used. For example, if you have 5 pounds of sugar and use 2 pounds, the remaining amount is 5 - 2 = 3 pounds.

Front

What is the process to find the average?

Back

To find the average, add all the numbers together and then divide by the total count of numbers. For example, the average of 2, 4, and 6 is (2 + 4 + 6) ÷ 3 = 4.

Front

What is a decimal?

Back

A decimal is a way of representing fractions in a base 10 system. For example, 0.5 represents 1/2.

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, 1/4 + 1/2 = 1/4 + 2/4 = 3/4.

Front

What is the relationship between multiplication and division?

Back

Multiplication and division are inverse operations. If a x b = c, then c ÷ b = a.

Front

How do you solve a word problem involving multiplication?

Back

Identify the quantities involved, determine what is being asked, and set up a multiplication equation based on the information given.

Front

What is the importance of estimating in math?

Back

Estimating helps to quickly determine an approximate answer, which can be useful for checking the reasonableness of a calculated answer.