Mastering Multiplication of Unit Fractions and Whole Numbers

What is one way to think about 1/2 times 5?

• As multiplying 5 by 2

• As adding five 1/2's together

• As subtracting five 1/2's

• As dividing five by 1/2

How can you represent 1/2 times 5 using addition?

• 1/2 + 1/2 + 1/2 + 1/2

• 5 + 5 + 5

• 1/2 + 1/2 + 1/2 + 1/2 + 1/2

• 1/2 + 1/2 + 1/2

What is another way to think about 1/2 times 5?

• Starting with 10 things and doubling them

• Starting with 5 things and doubling them

• Starting with 10 things and taking 1/2 of them

• Starting with 5 things and taking 1/2 of them

If you start with 5 things and take 1/2 of them, how many do you get?

• 1 and 1/2

• 10

• 5

• 2 and 1/2

What happens if you divide each of the 5 wholes into halves?

• You get 1 and 1/2 halves

• You get 2 and 1/2 halves

• You get 5 halves

• You get 10 halves

How many of the halves are filled in when you divide 5 wholes into halves?

• 5

• 10

• 1 and 1/2

• 2 and 1/2

What is the first step in multiplying fractions?

• Subtract the fractions

• Divide the fractions

• Add the fractions

• Express both numbers as fractions

How can you express the number 5 as a fraction?

• 5/1

• 1/5

• 1/1

• 5/5

What is the result of multiplying 1/2 by 5/1?

• 2/5

• 1/5

• 5/2

• 5/5

What is the final result of 1/2 times 5?

• 5/5

• 2/5

• 5/2

• 1/5