Decimal Operations and Their Applications

This video tutorial by Ben from register nurse rn.com covers how to multiply and divide decimal numbers without a calculator, useful for exams like the SAT and ACT. It introduces mnemonics for multiplication (REC: Remove, Execute, Count) and division (MUD: Move, Use, Divide) to simplify the process. The video includes detailed examples for both operations, demonstrating step-by-step solutions and emphasizing the importance of understanding decimal placement. A free quiz is available at the end to test your knowledge.

Why is it important to learn how to multiply and divide decimals by hand?

• Because calculators are not allowed in some exams.

• Because it is more accurate than using a calculator.

• Because it is faster than using a calculator.

• Because it is a requirement for all math courses.

What does the 'R' in the mnemonic 'REC' stand for?

• Repeat the process

• Remove the decimals

• Rearrange the digits

• Round the numbers

In the multiplication example, what is the first step after removing the decimals?

• Count the decimal places

• Execute the multiplication

• Divide the numbers

• Add the numbers

How many decimal places are counted in the problem 6.32 x 3.41?

• Five

• Two

• Three

• Four

What is the final answer for the multiplication problem 6.32 x 3.41?

• 21.5512

• 21551.2

• 215.512

• 2155.12

When multiplying 4.53 x 6 x 12.2, what is the first step?

• Divide the numbers first

• Add all the numbers together

• Multiply two numbers first, then multiply the result by the third

• Multiply all three numbers at once

What does the 'M' in the mnemonic 'MUD' stand for?

• Multiply the numbers

• Move the decimal

• Mark the quotient

• Measure the distance

In the division example, what is the first step after moving the decimal in the divisor?

• Subtract the numbers

• Use the same number of decimal places in the dividend

• Add the numbers

• Multiply the numbers

What is the final answer for the division problem 0.36 divided by 1.2?

• 0.03

• 0.3

• 3.6

• 3

In the division problem 0.5 into 0.860, what is the first step?

• Multiply the numbers

• Move the decimal in the divisor

• Add the numbers

• Subtract the numbers