RCN Lesson 23: Solve Problems with Unlike Denominators

Last updated almost 3 years ago

17 questions

Closure Questions:
How did you feel about today's material? 
How do you add/subtract fractions with unlike denominators?

RCN Lesson 23: Solve Problems with Unlike Denominators

Last updated almost 3 years ago

17 questions

Develop Understanding
Today's Learning Goal: (U6, L12, L13)
Solve problems involving addition and subtraction of fractions with unlike denominators.
Today's Materials:
Laptop
Laptop charger
Pen/Pencil/Paper (optional)
Please complete the Jump Start (activator). You have 5 minutes before we review. This is independent it should be silent.
Reminders:
1. Ready for class
2. No cellphones
3. Volume must be low.
4. Read and follow all directions
5.) Take your bag off and immediately begin the Activator.

Required

Launch: Unlike Denominators (10 min)
 I'll do the question 5 
We'll do question 6 and 7 together 
You Try question 8 

Required

Activity 1: Priya’s Salad Dressing - (15 min) 

Required

Priya has 2/3 cup of olive oil. She is going to borrow some more from her neighbor. How much olive oil does she need to borrow to have enough to make the dressing?

Required

1 tablespoon is equal to 1/16 of a cup. Priya decides that 1 tablespoon of olive oil is close enough to what she needs to borrow from her neighbor. Do you agree with Priya? Explain or show your reasoning.

Required

Activity 2: More Problems to Solve - (15 min) 
(In groups of 2) You and your partner will each choose a different problem to solve and then you will discuss your solution

Required

Problem A: Jada is baking protein bars for a hike. She adds 1/2 cup of walnuts and then decides to add another 1/3 cup. How many cups of walnuts has she added altogether?
If the recipe requires 1 1/3 cups of walnuts, how many more cups of walnuts does Jada need to add?
(Explain or show your reasoning.)

Required

Problem B: Kiran and Jada hiked 1 1/2 miles and took a rest. Then they hiked another 4/10 mile before stopping for lunch. How many miles have they hiked so far?
If the trail they are hiking is a total of
2 1/2 miles, how much farther do they have to hike?
(Explain or show your reasoning.)

Lesson Synthesis: (5 min) 

Today we solved problems that required adding and subtracting fractions

Required

What strategy did you use to find out how much salad dressing Priya’s recipe makes?

Required

What strategy did you use to find this difference for the olive oil?

Cool Down: Evaluate Expression - (5 min)

 

Required

Priya hiked 1 2/3 miles. Diego hiked 1/2 mile. How much farther did Priya hike than Diego?
(Explain or show your reasoning.)

Required

On Monday, Andre hiked 3/4 mile in the morning and 1 1/3 miles in the afternoon. How far did Andre hike on Monday?
(Explain or show your reasoning.)

Closure Questions:
How did you feel about today's material? 
How do you add/subtract fractions with unlike denominators?

RCN Lesson 23: Solve Problems with Unlike Denominators

Closure Questions:

RCN Lesson 23: Solve Problems with Unlike Denominators

Launch: Unlike Denominators (10 min)

I'll do the question 5

We'll do question 6 and 7 together

You Try question 8

Activity 1: Priya’s Salad Dressing - (15 min)

Priya has 2/3 cup of olive oil. She is going to borrow some more from her neighbor. How much olive oil does she need to borrow to have enough to make the dressing?

1 tablespoon is equal to 1/16 of a cup. Priya decides that 1 tablespoon of olive oil is close enough to what she needs to borrow from her neighbor. Do you agree with Priya? Explain or show your reasoning.

Activity 2: More Problems to Solve - (15 min)

(In groups of 2) You and your partner will each choose a different problem to solve and then you will discuss your solution

Problem B: Kiran and Jada hiked 1 1/2 miles and took a rest. Then they hiked another 4/10 mile before stopping for lunch. How many miles have they hiked so far? If the trail they are hiking is a total of 2 1/2 miles, how much farther do they have to hike? (Explain or show your reasoning.)

Lesson Synthesis: (5 min)

Today we solved problems that required adding and subtracting fractions

What strategy did you use to find out how much salad dressing Priya’s recipe makes?

What strategy did you use to find this difference for the olive oil?

Cool Down: Evaluate Expression - (5 min)

Priya hiked 1 2/3 miles. Diego hiked 1/2 mile. How much farther did Priya hike than Diego? (Explain or show your reasoning.)

On Monday, Andre hiked 3/4 mile in the morning and 1 1/3 miles in the afternoon. How far did Andre hike on Monday? (Explain or show your reasoning.)

Closure Questions:

Jump Start: NumberTalk Sums of 1/8 - (5 min)

Launch: Unlike Denominators (10 min)

I'll do the question 5

We'll do question 6 and 7 together

You Try question 8

Activity 1: Priya’s Salad Dressing - (15 min)

Priya has 2/3 cup of olive oil. She is going to borrow some more from her neighbor. How much olive oil does she need to borrow to have enough to make the dressing?

1 tablespoon is equal to 1/16 of a cup. Priya decides that 1 tablespoon of olive oil is close enough to what she needs to borrow from her neighbor. Do you agree with Priya? Explain or show your reasoning.

Priya says her recipe will make about1 1/2 cups of dressing. Do you agree? Explain or show your reasoning

Activity 2: More Problems to Solve - (15 min)

(In groups of 2) You and your partner will each choose a different problem to solve and then you will discuss your solution

Problem B: Kiran and Jada hiked 1 1/2 miles and took a rest. Then they hiked another 4/10 mile before stopping for lunch. How many miles have they hiked so far? If the trail they are hiking is a total of 2 1/2 miles, how much farther do they have to hike? (Explain or show your reasoning.)

Lesson Synthesis: (5 min)

Today we solved problems that required adding and subtracting fractions

What strategy did you use to find out how much salad dressing Priya’s recipe makes?

What strategy did you use to find this difference for the olive oil?

Cool Down: Evaluate Expression - (5 min)

Priya hiked 1 2/3 miles. Diego hiked 1/2 mile. How much farther did Priya hike than Diego? (Explain or show your reasoning.)

On Monday, Andre hiked 3/4 mile in the morning and 1 1/3 miles in the afternoon. How far did Andre hike on Monday? (Explain or show your reasoning.)

Jump Start: NumberTalk Sums of 1/8 - (5 min)

Priya says her recipe will make about1 1/2 cups of dressing. Do you agree? Explain or show your reasoning

Problem B: Kiran and Jada hiked 1 1/2 miles and took a rest. Then they hiked another 4/10 mile before stopping for lunch. How many miles have they hiked so far?
If the trail they are hiking is a total of
2 1/2 miles, how much farther do they have to hike?
(Explain or show your reasoning.)

Priya hiked 1 2/3 miles. Diego hiked 1/2 mile. How much farther did Priya hike than Diego?
(Explain or show your reasoning.)

On Monday, Andre hiked 3/4 mile in the morning and 1 1/3 miles in the afternoon. How far did Andre hike on Monday?
(Explain or show your reasoning.)

Priya says her recipe will make about
1 1/2 cups of dressing. Do you agree? Explain or show your reasoning

Problem B: Kiran and Jada hiked 1 1/2 miles and took a rest. Then they hiked another 4/10 mile before stopping for lunch. How many miles have they hiked so far?
If the trail they are hiking is a total of
2 1/2 miles, how much farther do they have to hike?
(Explain or show your reasoning.)

Priya hiked 1 2/3 miles. Diego hiked 1/2 mile. How much farther did Priya hike than Diego?
(Explain or show your reasoning.)

On Monday, Andre hiked 3/4 mile in the morning and 1 1/3 miles in the afternoon. How far did Andre hike on Monday?
(Explain or show your reasoning.)

Priya says her recipe will make about
1 1/2 cups of dressing. Do you agree? Explain or show your reasoning