Solving One-Step Equation

Addition

100

r + 12 = 25

r = 13

200

32 = c + 20

c = 12

300

-11 + n = 11

n = 22

400

41 + a = 19

a = -21

500

-51 + b = -91

b = - 40

Subtraction

100

19 = j - 5

j = 24

200

w - 43 = 15

w = 58

300

x - 31 = -61

x = -30

400

x - 95 = -57

x = 38

500

-98 = m - 78

m = -20

Random

100

What is the inverse operation of subtraction?

Addition

200

When solving one step equations, how will I verify if my answer is correct?

Subtitution (by substituting the vaule of the varible back in to the original equation).

300

What is the difference between an expression and an equation?

An expression is a mathematical phrase that does not contain an equal sign; however, an equation is a mathematical sentence that contains an equal sign

400

What would you do to isolate the variable?

-20.9 = b - 3.4

Add 3.4 on the right side of the equation

500

What are the step in solving one step equations?

1. Isolate the variable on one side of the equation.
2. Apply the inverse operation to both side of the equation
3. Check your work by substitution (substitute the value of the variable back in to the equation).

Mixed Bag

100

Find the mistake:

z + 36 = 57

    + 36 =+36

        z = 93

Instead of adding 36 on both sides, we should have subtracted 36 on both sides.

200

Poppy and Alex are collecting seashells. Poppy has collected 14 seashells and Alex collected x seashells. Together they collected a total of 36 seashells.

Write an equation that describes how many seashells does Poppy and Alex have.

a + 14 = 36

 or

14 + a =36

300

y - 15 = 5.8

y = 20.8

400

Last week, Perry ran 30 miles more than DeShawn. If Perry ran 46 miles, how many miles did DeShawn run?

Write an equation and evaluate.

d + 30 =  46

            -  30 = - 30        

       d = 16

500

-134 = x + 562

x = -696