Unit 5 Lesson 7: Adding & Subtracting to Solve Review

Is the solution to  $-1.4\ +\ x=-4.2$  positive or negative?

• Positive

• Negative

Which of the following are solutions to  $-1.4\ +\ x=-4.2$ ?

•  $-4.2\ +\ 1.4$  

•  $4.2\ -\ 1.4$  

•  $-4.2\ -\ \left(-1.4\right)$  

•  $-4.2\ \ -\ 1.4$  

What is the difference between Monday and Wednesday's inventory?

Which expression would show the difference in Thursday and Tuesday's inventory?

• $16\ -\ 4$

• $4-16$

What is the difference in week 2 between the electricity generated and the electricity used?

What is the difference between the value of the electricity generated in week 1 and 4?

How much higher is 320 m than 150 m?

• 170 m

• 470 m

• -170 m

• -470 m

How much higher is 240 m than -150 m?

• -90 m

• 90 m

• -390 m

• 390 m

What is the change in elevation from 7,200 m to 4,600 m?

What is the value of a?

• $1,100

• -$100

• $100

• -$1,100