Subtracting Mixed Numbers with Like Denominators Using a Number Line

This video tutorial teaches how to subtract mixed numbers with like denominators using a number line. It begins with a review of mixed numbers using an area model and highlights common mistakes, such as confusing 1 and 2/4 with 12/4. The lesson then demonstrates subtraction using a number line, emphasizing the importance of order in subtraction. Two example problems are solved: subtracting 2/5 from 2 and 3/5, and subtracting 1 and 2/10 from 3 and 6/10, illustrating the process and resulting differences.

What is a common mistake when interpreting the mixed number 1 and 2/4?

• Thinking it is the same as 12/4

• Confusing it with 1 and 1/2

• Believing it equals 2 and 1/4

• Assuming it is equivalent to 3/4

When subtracting mixed numbers, why is the order important?

• Because it determines the correct difference

• Because it affects the size of the number line

• Because it changes the denominators

• Because it alters the number of parts

How is the number line divided when subtracting 2 and 3/5 minus 2/5?

• Into 5 equal parts

• Into 4 equal parts

• Into 10 equal parts

• Into 3 equal parts

What is the result of subtracting 1 and 2/10 from 3 and 6/10?

• 1 and 4/10

• 3 and 4/10

• 2 and 2/10

• 2 and 4/10

How many equal parts is the number line divided into when subtracting 3 and 6/10 minus 1 and 2/10?

• 5 equal parts

• 10 equal parts

• 6 equal parts

• 4 equal parts