200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Inverse Operations Word Problems Mental Math Vocabulary.

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Presentation transcript:

Inverse Operations Word Problems Mental Math Vocabulary Algebraic Expressions

What is the inverse operation of addition?

Subtraction

What is the inverse operation of multiplication?

Division

In the equation, 3x=90, HOW do you solve for X?

Divide both sides of the equation by 3

In the equation, X- 2.58=11, how do solve for X?

Add 2.58 to both sides of the equation

In the equation X/40=1000, how do you solve for X?

Multiply by 40 on both sides of the equation.

Write an expression for the “product of 11 and 93”

(11)(93), 11*93, or 11x93

A horse has 4 legs, if a ranch has a total of 196 horse legs, how many horses are on the ranch?

X= number of total horses 4(x)=196 4x/4=196/4 x=49 horses

Ms. Maes receives 64 s a week for X weeks in a row. Write an expression to show the number of s that Ms. Maes received.

64(X)

A rectangle has a length of 8cm and a width of 11cm. What is the area of the rectangle?

A=l*w A=8(11) A= 88cm²

Anne has $4.25 and John has 15 quarters. Who has more money and by how much?

Anne has more money than John by $.50. John only has $3.75 and Anne has $4.25.

10m=300 Solve for M

10m=300 10m/10=300/10 m=30

60=m+21

60=m =m =m

Y/7=70

Y/7=70 Y/7 (7)= 70(7) Y=490

15=c+ 2.68

15=c =c =c

49.21=7x

49.21=7x 49.21/7=7x/7 7.03=x

In a word problem, what operation should you perform when you see the word “sum?”

Addition

In a word problem, what operation should you perform when you see the word “quotient?”

Division

In a word problem, what operation should you perform when you see the word “product?”

Multiplication

What are pairs of operations that undo each other; addition &subtraction; multiplication & division.

Inverse Operations

What is a mathematical phrase involving at least one variable and sometimes numbers and operation symbols.

Algebraic expression

If m=10 and n=5 evaluate the expression 2m-n

M=10, n=5 2m-n 2(10)

M==3, n=5, p= p-mn

30(2.1)-(3)

Complete the chart Complete the table Mrs. Crippen’s AgeMr. Crippen’s Age a?

A-2

Complete the table LengthWidthArea L3?

A=3(L)

Write “five and four hundredths is two and one tenth subtracted from y” as an algebraic equation.

Write “five and four hundredths is two and one tenth subtracted from y” as an algebraic equation. 5.04=y-2.1