IM: 7.5.7: Adding and Subtracting to Solve Problems (Lesson)

Last updated 11 months ago

16 questions

7.1: Positive or Negative?

Is the solution to -2.7+x=-3.5 positive or negative?

7.2: Phone Inventory

7.3: Solar Power

7.4: Differences and Distances

IM: 7.5.7: Adding and Subtracting to Solve Problems (Lesson)

Last updated 11 months ago

16 questions

7.1: Positive or Negative?

Is the solution to -2.7+x=-3.5 positive or negative?

Select all the expressions that are solutions to -2.7+x=-3.5.

7.2: Phone Inventory

A store tracks the number of cell phones it has in stock and how many phones it sells.

The table shows the inventory for one phone model at the beginning of each day last week. The inventory changes when they sell phones or get shipments of phones into the store.

What do you think it means when the change is positive? Negative?

What do you think it means when the inventory is positive? Negative?

Based on the information in the table, what do you think the inventory will be at on Saturday morning? Explain your reasoning.

7.3: Solar Power

Han's family got a solar panel. Each month they get a credit to their account for the electricity that is generated by the solar panel. The credit they receive varies based on how sunny it is.

Here is their electricity bill from January.

In January they used $83.56 worth of electricity and generated $6.75 worth of electricity.

In July they were traveling away from home and only used $19.24 worth of electricity. Their solar panel generated $22.75 worth of electricity. What was their amount due in July?

The table shows the value of the electricity they used and the value of the electricity they generated each week for a month. What amount is due for this month?

While most rooms in any building are all at the same level of air pressure, hospitals make use of "positive pressure rooms" and "negative pressure rooms."

What do you think it means to have negative pressure in this setting?

What could be some uses of these rooms?

7.4: Differences and Distances

Plot these points on the coordinate grid in the applet.

A=(5,4) 
B=(5,-2) 
C=(-3,-2) 
D=(-3,4) 

https://curriculum.illustrativemathematics.org/MS/students/2/5/7/index.html

[Scroll to the tool under "7.4: Differences and Distances"]

IM: 7.5.7: Adding and Subtracting to Solve Problems (Lesson)

Is the solution to -2.7+x=-3.5 positive or negative?

IM: 7.5.7: Adding and Subtracting to Solve Problems (Lesson)

Is the solution to -2.7+x=-3.5 positive or negative?

Select all the expressions that are solutions to -2.7+x=-3.5.

What do you think it means when the change is positive? Negative?

What do you think it means when the inventory is positive? Negative?

Based on the information in the table, what do you think the inventory will be at on Saturday morning? Explain your reasoning.

In July they were traveling away from home and only used $19.24 worth of electricity. Their solar panel generated $22.75 worth of electricity. What was their amount due in July?

The table shows the value of the electricity they used and the value of the electricity they generated each week for a month. What amount is due for this month?

What do you think it means to have negative pressure in this setting?

What could be some uses of these rooms?

What shape is made if you connect the dots in order?

What are the side lengths of figure ABCD?

Select all the expressions that are solutions to -2.7+x=-3.5.

What do you think it means when the change is positive? Negative?

What do you think it means when the inventory is positive? Negative?

Based on the information in the table, what do you think the inventory will be at on Saturday morning? Explain your reasoning.

What is the difference between the greatest inventory and the least inventory?

In July they were traveling away from home and only used $19.24 worth of electricity. Their solar panel generated $22.75 worth of electricity. What was their amount due in July?

The table shows the value of the electricity they used and the value of the electricity they generated each week for a month. What amount is due for this month?

What is the difference between the value of the electricity generated in week 1 and week 2? Between week 2 and week 3?

What do you think it means to have negative pressure in this setting?

What could be some uses of these rooms?

What shape is made if you connect the dots in order?

What are the side lengths of figure ABCD?

What is the difference between the x-coordinates of B and C?

What is the difference between the x-coordinates of C and B?

How do the differences of the coordinates relate to the distances between the points?

What is the difference between the greatest inventory and the least inventory?

What is the difference between the value of the electricity generated in week 1 and week 2? Between week 2 and week 3?

What is the difference between the x-coordinates of B and C?

What is the difference between the x-coordinates of C and B?

How do the differences of the coordinates relate to the distances between the points?