# Math Homework Tips for Week of February 24, 2014

Divide Decimals by Whole Numbers—When dividing decimals by a whole number, just bring the decimal point up into the quotient and divide like any other number.

Divide with Decimals—When dividing decimals by a decimal, the decimal point is moved to the right in the divisor and the dividend the same number of places and then brought up into the quotient.

Algebraic Expressions- An algebraic expression is a mathematical phrase that includes at least one variable. A variable is a letter or symbol that stands for one or more numbers. Students will be asked to write algebraic expression for word expressions.

For example: 11 more than e is 11 + e.

Identify Parts of Expressions- In this lesson, students will be asked to identify parts of an expression.

For example: 5m + 2n
The expression is the sum of 2 terms. The first term is the product of 5 and m. The second term is the product of 2 and n. Word expression: the sum of 5 times m and 2 times n.

Evaluate Algebraic Expressions and Formulas—When evaluating algebraic expression, substitute numbers for the variables and then follow the order of operations.

For example: Evaluate 25 + 9w when w = 8.

25 + (9 x 8) = 25 + 72 = 97

# Homework Tips for Week of February 17, 2014

Adding and Subtracting Decimals-When adding and subtracting decimals make sure to line up the decimals points before adding or subtracting and then just bring down the decimal point into the answer.

For example: 2.567
+ 21.3__
23.867

Multiplying Decimals—When multiplying by decimals, just multiply as if the decimal isn’t there. After you get the product, count the number of digits that are behind the decimals points. Then, count from right to left in the product that same number and place the decimal point.

Divide Decimals by Whole Numbers—When dividing decimals by a whole number, just bring the decimal point up into the quotient and divide like any other number.

Divide with Decimals—When dividing decimals by a decimal, the decimal point is moved to the right in the divisor and the dividend the same number of places and then brought up into the quotient.

# Week of February 10-14, 2014

Chapter 1 Mid-Chapter Study Guide

Greatest Common Factor or GCF-the greatest factor that two or more numbers have in common. The factors of two numbers is less than or equal to the numbers.

Least Common Multiple or LCM-the least number that is a common multiple of two or more numbers. The least common multiple of two numbers is greater than or equal to the numbers.

Prime Number—has only two factors, 1 and itself.

Prime Factorization—the number written as a product of all of its prime factors.

Be able to solve problems that require finding the greatest common factor and using the distributive property to answer questions.

Chapter 7 Mid-Chapter Study Guide

Term—the parts of the expression that are separated by an addition or subtraction sign.

Variable—a letter or symbol that stands for one or more numbers.

Coefficient—a number that is multiplied by a variable.

Exponent—a number that tells how many times a number called the base is used as a repeated factor.

Numerical Expression—a mathematical phrase that uses only numbers and operation symbols.

Algebraic Expression—a mathematical phrase that includes at least one variable.

Order of Operations—Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction