Solving Addition and Subtraction Equations

Solve for x

x - 8 = 20

• 12

• 28

Tags

CCSS.6.EE.B.7

x + 25 = 40

Since this is an addition problem, what operation do we need to perform in order to isolate the variable x?

• addition

• subtraction

• mulitplication

• division

Tags

CCSS.6.EE.B.7

In the previous question, the answer was "subtraction." Addition and subtraction are "_______" operations.

• inverse

• lopsided

• commutative

Tags

CCSS.6.NS.B.3

To find the solution to the following equation, you need to "_______" the variable.

23 + x = 88

• make a pancake out of

• transfer

• isolate

• duplicate

Tags

CCSS.6.EE.B.7

So what is the solution to that problem?

23 + x = 88

• 65

• 66

• 67

• 111

Tags

CCSS.6.EE.B.7

I can run a mile in 8.3 minutes. You can run a mile in 5.7 minutes (Wow! That would be fast!) How much longer does it take me than you to run a mile?

Define a variable. That's all.

• x

• my time

• your time

• difference between my time and your time

Tags

CCSS.6.EE.B.7

I can run a mile in 8.3 minutes. You can run a mile in 5.7 minutes (Still fast!) How much longer does it take me than you to run a mile?

• 3.2 minutes

• 3.4 minutes

• 2.4 minutes

• 2.6 minutes

Tags

CCSS.6.NS.B.3

Still with the running. I can run a mile in 8.3 minutes. You can run a mile in 5.7 minutes (Still fast!) How much longer does it take me than you to run a mile? Choose the only equation that will solve the problem.

• 5.7 + x = 8.2

• x - 5.7 = 8.2

• 5.7 + 8.2 = x

Tags

CCSS.HSA.CED.A.3

Lee is surfing. They've surfed 13 waves already and have 18 to go to break their record of most waves surfed in one day. Which equation will help answer the question, "How many more waves does Lee need to surf to break their one-day record?"

• 13 = 18 - x

• 13 = x - 18

• x = 18 - 13

Tags

CCSS.HSA.CED.A.3

Solve.

470 = a - 81, using this equation.

• 550

• 551

• 552

• 555

Tags

CCSS.6.EE.B.7