Study Guide 5th grade

Study Guide 5th grade

Vocabulary: Caterpillar, sketched, disrespect, cocoon, emerge, migrant, unscrewed, diplomat, representatives, visa, issue, refugees, agreement, superiors, cable, traditions, behavior, sacred, benefactor, astonished, gratitude, procession, distribution, recommend, environment, contribute, enthusiastic, investigation.

Examples:

Mexicans have many traditions that they celebrate.

Everyone must take care of our environment and recycle.

Many migrant workers go to work in the United States.

Past or present:

Examples

Yesterday we ______________ the park.  (Visit/Visited)

Angelica ______________ tired now. (looks, looked)

Multiplying Decimals by Decimals

Step 1 Multiply as though both numbers were whole numbers.

0.89 x 3.7 = 3293

Step 2 Write the decimal point in the product.

0.89 x 3.7= 3.293

Variable and Expressions

We call n a variable because it stands for a value that can change or vary. $5.50 x n is called and algebraic expression. An algebraic expression is a mathematical phrase involving variables, numbers and operations.

Examples:

Addition 4 + a, or a +4        Subtraction b-4    Multiplication 4 x c, or 4c  

Division d ÷ 4, or  d

4                               Example: n=7 and n = 8:

n – 3 = 4;5

Operation	Word Phrase	Algebraic Expression
Addition	A number plus 18. Sum of a number and 18 18 more than a number A number increased by 18	x + 18
Subtraction	A number minus 6 The difference between a number and 6 6 less than a number. A number decreased by 6	x - 6
Multiplication	3 times a number, A number multiplied by 3, The product of a 3 and a number.	3 x n 3 n
Division	A number divided by 12: The quotient of a number and 12	m ÷ 12 , m                12