Subtract Decimals: Standard

The video tutorial explains how to subtract decimal numbers using examples involving weights, earnings, and mixtures. It emphasizes the importance of aligning decimal points, starting subtraction from the rightmost place value, and regrouping when necessary. The tutorial also highlights the need to include units of measure in the final answer.

What is the first step when subtracting decimal numbers?

• Start subtracting from the leftmost digit

• Add the numbers first

• Line up the decimal points

• Convert decimals to fractions

How much less did Michael weigh at birth compared to Maria?

• 2.5 lbs

• 1.8 lbs

• 3.5 lbs

• 2.2 lbs

How much more did Riley earn in January compared to February?

• $2.50

• $1.75

• $3.25

• $4.00

What is the correct way to handle subtraction when the top digit is smaller than the bottom digit?

• Subtract the smaller digit from the larger one

• Ignore the smaller digit

• Add 10 to the smaller digit

• Regroup from the next left digit

What is the weight of the other substance in the mixture?

• 119.30 grams

• 120.50 grams

• 118.89 grams

• 115.75 grams

Why is it important to include the unit of measure in your answer?

• It is required by math rules

• It helps in understanding the context

• It makes the answer look longer

• It is optional and not necessary

What should you do if you cannot subtract a digit in a decimal subtraction problem?

• Skip the digit

• Add 1 to the digit

• Regroup from the next higher place value

• Multiply the digit by 2