Estimate Sums & Differences - Fractions

Estimate, then find the sum or difference.

Siobhan has $\frac{3}{8}$ pound of ground beef in a mixing bowl. He places an additional $\frac{4}{5}$ pound of ground beef in the bowl.

Using benchmarks (0, $\frac{1}{2}$, 1, 1$\frac{1}{2}$, etc.), about how many pounds of ground beef is in the mixing bowl?

How many pounds does Siobhan actually have in his mixing bowl?

What do we call this type of fraction?

Is this type of fraction less than, greater than, or equal to one whole?

Estimate, then find the sum or difference.

Geoffrey purchased $\frac{7}{8}$ ounce bag of gummy bears. He then ate $\frac{1}{6}$ ounce from the bag.

Using benchmarks (0, $\frac{1}{2}$, 1, 1$\frac{1}{2}$, etc.), about how many ounces are left in the bag?

How many ounces does Geoffrey actually have left in the bag?

What do we call this type of fraction?

Is this type of fraction less than, greater than, or equal to one whole?

Estimate, then find the sum or difference.

Alfred ran $\frac{5}{8}$ mile after school on Tuesday. He then ran another $\frac{2}{5}$ mile after school on Wednesday.

Using benchmarks (0, $\frac{1}{2}$, 1, 1$\frac{1}{2}$, etc.), about how many miles did Alfred run after school on Tuesday and Wednesday?

How many miles does Alfred actually run after school Tuesday and Wednesday?

What do we call this type of fraction?

Is this type of fraction less than, greater than, or equal to one whole?

Jena uses $\frac{7}{8}$ cup of raisins for muffins and $\frac{5}{8}$ cup of raisins for a bowl of oatmeal.

Does Jena need more than or less than 1 cup of raisins to make muffins and oatmeal?

How do you know?

A group of students ate $\frac{5}{12}$ of a cheese pizza, $\frac{7}{8}$ of a pepperoni pizza, and $\frac{5}{8}$ of a veggie pizza.

Using benchmark fractions:

What is $\frac{5}{12}$ closest to?

What is $\frac{7}{8}$ closest to?

What is $\frac{5}{8}$ closest to?

About how many pizzas were eaten?

On Saturday, the scouts hiked $\frac{4}{5}$ mile up the mountain. On Sunday, they hiked $\frac{1}{4}$ mile up the mountain.

Using benchmark fractions:

What is $\frac{4}{5}$ closest to?

What is $\frac{1}{5}$ closest to?

About how far did the scouts hike up the mountain in all?

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Which sum is greatest? Use estimation (benchmarks) to decide.

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