**Warmup**

Move the sliders up the bars to match the number on the place value diagram. Note: After highlighting the circle, you can use the ↑ ↓ keys on your keyboard to move the circle up or down. Start with the “Ones”. When you are done, check the Submit button. Click for another problem.

**Activity #1**

**Division of Whole Numbers by Decimals. **

In this activity, you are going to explore the size of a quotient by using the red slider to choose different values for the denominator. Follow the instructions below to interact with the applet.

- Set the Dividend slider to 2.
- Gradually reduce the value of the divisor by slowly moving red slider all the way to the left.
- Observe what happens to the size of the green box.
- Now, gradually increase the value of the divisor by slowly moving the red slider all the way to the right.
- Observe what happens to the size of the green box, and the other boxes.

Answer the following questions.

**Activity #2**

**Divide Decimals by Decimals**

- Check the solution steps to see the process of dividing two fractions before going to divide them.
- Use the slider to increase the decimal places.

**Activity #3**

**More on Division of Decimals.**

- Decide which of the following expressions would have the same value as 250 ÷ 10.

What is your reasoning for each correct answer?

**Challenge #1**

Here is a diagram representing a base-ten number. The large rectangle represents a unit that is 10 times the value of the square. The square represents a unit that is 10 times the value of the small rectangle.

(1.) If a large rectangle represents 1,000, what division problem did the second diagram show? What is its answer?

(2.) If a large rectangle represents 100, what division problem did the second diagram show? What is its answer?

(3.) If a large rectangle represents 10, what division problem did the second diagram show? What is its answer?

**Challenge #2**

(1.) Use long division to find the value of 5.04 ÷ 7.

(2.) Select all of the quotients that have the same value as 5.04 ÷ 7.

**Challenge #3**

A bag of pennies weighs 5.1 kilograms. Each penny weighs 2.5 grams.

**Quiz Time**

https://www.ixl.com/math/grade-5/divide-by-decimals-without-adding-zeros

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