Add Fractions with Unlike Denominators

Multiple Choice

In this lesson what will you learn?

• to find the sum of fractions with the same denominator

• to find the sum of fractions with unlike denominators

• to subtract fractions with the same denominator

• to subtract fractions with unlike denominators.

Multiple Choice

Which IS NOT a success criteria for this lesson?

• Find the common denominator of two fractions

• Use models and equivelent fractions to add fractions

• Simplify fractions

• Solve real-world problems

Poll

A good learner _______.

• is engaged and ready to learn

• perseveres through the lesson and doesn't give up

• takes ownership of their learning

• uses their learning intentions and success criteria to help them learn

Multiple Choice

Which of the following is the correct definition of a denominator?

• The number of pieces of the whole

• The denominator of more than one fraction

• The number of equal pieces that the whole is divided into

• Fractions with different numerators and denominators, but have the same value

Multiple Select

Which of the following are steps to add fractions with unlike denominators?

• Find a common denominator

• Multiply numerators by different numbers

• Add the new fractions

• Subtract the denominators

Draw

Can the given common denominator be used to add each pair of fractions?

Choose Yes or No for each statement.

Drag and Drop

Rewrite the equation using common denominators and find the sum.

Drag a fraction into each box. Not all answer choices will be used.

$$\frac{2}{5}\ +\ \frac{1}{2}\ \ =\ ?$$

​

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$$+$$ ​

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$$=$$ ​

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Drag these tiles and drop them in the correct blank above

Dropdown

Sabrina is making snack mix. She uses the items listed in the table below.

What is the total weight of all the items Sabrina uses?

Sabrina says that she uses less than a pound of granola, chocolate chips, and raisins because the sum of their weights is $$\frac{5}{12}$$ pound. Is Sabrina correct?

Choose one option from each drop-down menu to answer the question.

To find the total weight of the granola, chocolate chips, and raisins, Sabrina should first ​

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. The sum of the weights will have a denominator of​

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and a numerator of ​ ​

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  . Since the total weight is​

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than one pound, Sabrina is​

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.

Multiple Choice

Adela is adding $$\frac{7}{8}$$ and $$\frac{5}{6}$$ . How should Adela start?

• Add the numerators. The sum of 7 and 5 is 12

• Add the denominators. The sum of 8 and 6 is 14

• Find a common numerator. 35 is a multiple of both 7 and 5.

• Find a common denominator. 24 is a multiple of both 8 and 6.

Multiple Choice

Zoe follows a 4-step routine for washing her hair on wash day. The table shows how long each step takes.

How long does it take Zoe to detangle and shampoo her hair?

• $$\frac{5}{12}$$

• $$\frac{4}{12}$$

• $$1\frac{1}{12}$$

• $$1\frac{1}{2}$$

Multiple Choice

Lucia $$\frac{1}{2}$$ eats of a pizza. Celeste eats $$\frac{5}{12}$$ of a pizza. What fraction of a whole pizza have Lucia and Celeste together eaten?

• $$\frac{6}{12}$$

• $$\frac{6}{14}$$

• $$\frac{11}{12}$$

• $$\frac{11}{14}$$

Drag and Drop

Use the fraction bars to help add $$\frac{1}{2}$$ and $$\frac{2}{3}$$ . What are two ways to write the sum? Drag a number into each box. $$\frac{1}{2}+\frac{2}{3}\ =$$ ​

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$$\frac{1}{2}\ +\ \frac{2}{3}\ =$$ ​ ​

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Drag these tiles and drop them in the correct blank above

Open Ended

$$\frac{9}{16}$$ Mr. Alvarado lights a candle during Día de Muertos. On November 1 , the candle burns $$\frac{1}{4}$$ inch. On November 2 , the candle burns $$\frac{5}{16}$$ inch. How much does the candle burn in all?

Open Ended

Darius and Hiroshi are working together to fold 1,000 cranes for their friend. Darius $$\frac{1}{2}$$ folds of the cranes. Hiroshi folds $$\frac{2}{5}$$ of the cranes. What fraction of the cranes are folded?

Multiple Choice

Molly is adding $$\frac{3}{4}+\frac{5}{6}$$ . First she wants to use the least common multiple to find a common denominator. Molly correctly finds the least common multiple of 4 and 6 by making a pair of lists.

Which pair of lists could Molly have made?

Dropdown

Kendra is using different colors and lengths of cloth to sew trim for a quilt, as shown in the table below.



Kendra says that she uses less than a yard of white, yellow, and green cloth because the sum of their lengths is $$\frac{4}{14}$$ yard. Is Kendra correct? Choose one option from each drop-down menu to answer the question.

To find the sum of the lengths of white, yellow, and green cloth, Kendra ​

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to find a common denominator.  She should ​ ​

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. The sum of the lengths is ​

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yard(s), which is ​

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​​ t​han a yard. So, Kendra is​

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