Currency Conversion and Proportions

The video tutorial explains how to solve proportion word problems through three examples: resizing a rectangle, buying oranges with a budget, and converting currency. Each problem is solved by setting up a proportion and using cross-multiplication to find the unknown value. The tutorial emphasizes the importance of consistent units and provides step-by-step guidance for each example.

What is the first step in solving a proportion word problem?

• Identify the unknown variable

• Draw a picture

• Set up a proportion

• Cross-multiply

In the rectangle resizing problem, what is the original width of the rectangle?

• 9 inches

• 27 inches

• 4 inches

• 12 inches

Tags

CCSS.7.RP.A.2B

How do you solve for the unknown in a proportion?

• Subtract the numbers

• Multiply all numbers

• Cross-multiply and divide

• Add the numbers

What is the new width of the rectangle after resizing?

• 4 inches

• 27 inches

• 9 inches

• 12 inches

Tags

CCSS.3.OA.A.3

How many oranges can Laura buy with $6?

• 8 oranges

• 15 oranges

• 12 oranges

• 10 oranges

Tags

CCSS.7.RP.A.2B

What is the proportion set up for the oranges problem?

• 8/15 = X/6

• 15/30 = 6/X

• 6/15 = X/30

• 30/15 = X/6

Tags

CCSS.6.RP.A.3B

What is the exchange rate used in the currency conversion problem?

• 75 cents per 5 pesos

• 75 cents per 10 pesos

• 75 cents per 15 pesos

• 75 cents per 20 pesos

Tags

CCSS.6.RP.A.3B

How many dollars does Juan receive after exchanging 110 pesos?

• $8.25

• $7.50

• $9.00

• $10.00

Tags

CCSS.6.RP.A.3B

What is the unknown variable in the currency conversion problem?

• Time

• Exchange rate

• Dollars

• Pesos

Tags

CCSS.7.RP.A.2C

What is the final step in solving a proportion problem?

• Subtract the smaller number

• Cross-multiply

• Divide to isolate the variable

• Add all numbers

Tags

CCSS.7.RP.A.2C