Mastering Multiplication and Division of Fractions

In this video, the teacher explains how to multiply and divide fractions using algorithms. The lesson begins with an introduction to the learning target, emphasizing the importance of following an algorithm. The teacher demonstrates multiplying fractions by multiplying numerators and denominators separately, followed by simplifying the result. The video also covers dividing fractions by multiplying with the reciprocal, again simplifying the final answer. Throughout the lesson, the teacher provides examples and clarifies common misconceptions, such as avoiding the butterfly method.

What is the learning target for today's lesson?

• We will learn about whole numbers.

• We will study decimal numbers.

• We will add and subtract fractions.

• We will multiply and divide fractions by following an algorithm.

Tags

CCSS.7.NS.A.1C

When multiplying fractions, what should you do with the numerators and denominators?

• Multiply the numerators and add the denominators.

• Multiply the numerators and multiply the denominators.

• Add the numerators and subtract the denominators.

• Divide the numerators and multiply the denominators.

Tags

CCSS.5.NF.B.6

What is the result of multiplying 1/4 by 2/3?

• 2/12

• 2/6

• 1/12

• 1/6

Tags

CCSS.5.NF.B.6

Why should you not use the butterfly method for multiplying fractions?

• It is only for whole numbers.

• It is not applicable for fractions.

• It takes too long.

• It is too complicated.

Tags

CCSS.5.NF.B.6

What is the first step when dividing fractions?

• Divide by the reciprocal.

• Multiply by the reciprocal.

• Subtract the fractions.

• Add the fractions.

Tags

CCSS.6.NS.A.1

What is a reciprocal?

• A fraction flipped upside down.

• A fraction subtracted from itself.

• A fraction multiplied by itself.

• A fraction added to itself.

What is the result of dividing 5/6 by 1/4?

• 20/24

• 5/4

• 20/6

• 5/24

Tags

CCSS.6.NS.A.1

What must you do to mixed numbers before multiplying or dividing them?

• Convert them to whole numbers.

• Convert them to improper fractions.

• Convert them to percentages.

• Convert them to decimals.

What is the simplified form of 36/40?

• 9/20

• 18/20

• 9/10

• 36/20

How many times does 5 go into 18?

• 5 times

• 4 times

• 3 times

• 2 times

Tags

CCSS.3.OA.A.3