Math Measurements with Proportions

What are some real-life examples where division is used to calculate quantities, measurements, rates, averages, or proportions?

• By finding patterns and relationships in numerical data

• By avoiding practical applications

• By understanding the application of division in various contexts such as budgeting, recipe conversions, speed calculations, and statistical analysis

• By promoting misunderstanding

Tags

CCSS.4.NBT.B.6

CCSS.5.NBT.B.6

How can division be used to find the size of equal groups or the number of groups in real-life situations?

• By finding patterns and relationships in numerical data

• By avoiding practical applications

• By understanding the application of division in contexts such as sharing items among a certain number of people, distributing resources evenly, or calculating rates and proportions

• By promoting misunderstanding

Tags

CCSS.4.NBT.B.6

CCSS.5.NBT.B.6

20 yards =________meters

• 18.28

• 15.23

• 18

• 15

Tags

CCSS.2.MD.A.2

5 quarts =________liters

• 7.63

• 4.78

• 4.70

• 4.73

Tags

CCSS.4.MD.A.1

The ratio of black keys to white keys on a piano is 5 to 7.  Complete the table to create additional equivalent ratios.

d

c

e

f

84

35

21

28

63

55

If the ratio of boys to girls in a class is 3:4, and there are 21 boys, how many girls are there?

The ratio of boys to girls in a class is 3 to 4.

There are 21 boys in the class.

how many girls are there?

Hint: Write a proportion and solve.

• 28 girls in the class

• 25 girls in the class

• 18 girls in the class

• 24 girls in the class

Tags

CCSS.7.RP.A.3

If the ratio of the lengths of two sides of a triangle is 3:4 and the perimeter of the triangle is 42 cm, what is the length of the shortest side?

• 9 cm

• 12 cm

• 15 cm

• 18 cm

Tags

CCSS.7.G.A.1

The ratio of black keys to white keys on a piano is 5 to 7.  Complete the table to create additional equivalent ratios.​

d

c

e

f

84

63

21

35

55

28

The ratio of black keys to white keys on a piano is 5 to 7.  Complete the table to create additional equivalent ratios.​

d

c

e

f

21

28

63

35

55

84