Rounding and Basic Operations

The video tutorial covers solving proportions with decimals using cross multiplication and division. The instructor demonstrates three examples, explaining each step and how to round the results to the nearest tenth or ten. Various calculators are suggested for use, and viewers are encouraged to pause the video to take notes.

What is the first step in solving a proportion problem with decimals?

• Cross-multiply the numbers

• Add the numbers

• Subtract the numbers

• Multiply the numbers by 10

Which tool is NOT mentioned as a calculator option in the video?

• Texas Instruments calculator

• iPhone calculator

• Desmos calculator

• Casio calculator

What is the main mathematical operation used in solving proportions?

• Cross-multiplication

• Addition

• Subtraction

• Exponentiation

In the first example, what is the result of 9.1 multiplied by 2.7?

• 26.57

• 23.57

• 25.47

• 24.57

What is the final result of the first example after division?

• 7.825

• 6.825

• 5.825

• 8.825

How is 6.825 rounded to the nearest tenth?

• 6.7

• 6.9

• 6.8

• 7.0

In the second example, what is the product of 9.2 and 7?

• 64.4

• 63.4

• 65.4

• 66.4

What is the result of dividing 64.4 by 3 in the second example?

• 23.466667

• 22.466667

• 24.466667

• 21.466667

How is 24.466667 rounded to the nearest tenth?

• 24.4

• 24.5

• 24.3

• 24.6

In the final example, what is the product of 4 and 2.5?

• 10

• 9

• 11

• 12