Understanding Fractions and Scale Factors

The video tutorial explains how to determine the scale factor of a scale drawing by comparing the model or scale to the actual or original size. It provides multiple examples, demonstrating how to set up ratios, simplify them, and convert between decimals and fractions using a calculator. The tutorial emphasizes the importance of understanding whether the result should be in decimal, fraction, or ratio form, and provides step-by-step guidance on using calculator functions to achieve the desired format.

What is the scale factor when the model is 0.75 and the original is 1.25?

• 0.6

• 0.75

• 1.5

• 1.25

How can the ratio 0.6 be expressed as a fraction?

• 1/2

• 5/6

• 2/3

• 3/5

If the original is 2 and the model is 3.5, what is the scale factor?

• 1.75

• 2.5

• 1.5

• 2

What is 1.75 expressed as a mixed number?

• 1 1/2

• 1 3/4

• 2 1/4

• 2

Tags

CCSS.7.RP.A.2B

What is the scale factor when the scale is 0.75 and the original is 1.75?

• 4/5

• 3/7

• 5/6

• 2/3

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

How can you convert a decimal to a fraction using a calculator?

• Use the logarithm function

• Use the percentage button

• Use the fraction conversion button

• Use the square root function

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

What is the simplified ratio of a scale of 6 to an original of 4?

• 3/2

• 2/3

• 4/5

• 5/6

What is the decimal equivalent of the ratio 3/2?

• 2

• 1.25

• 1.5

• 1.75

Which of the following is a correct method to find a scale factor?

• Subtract the model from the original

• Add the model to the original

• Multiply the model by the original

• Divide the model by the original

What should you pay attention to when asked to find fractions or decimal versions?

• The color of the model

• The size of the original

• Whether to use division or conversion

• The shape of the scale