Exploring Patterns in 3rd Grade Math

The video tutorial for third graders covers lesson 3.1, titled 'What's My Rule'. It begins with an introduction and lists the materials needed. The lesson includes a warm-up exercise on writing numbers in expanded form, followed by a practical exercise on bacteria doubling to illustrate multiplication. The concept of function machines is introduced, explaining how rules apply to input and output numbers. Students are guided through exercises in their math journals, applying various function rules to solve problems.

What is the correct expanded form of 136?

• 100 + 36

• 136

• 130 + 6

• 100 + 30 + 6

What do you need for today's math lesson?

• Whiteboard, marker, eraser, math journal, pencil

• Notebook, pen, calculator

• Laptop, notebook, pen

• Textbook, whiteboard, marker

How do you write 807 in expanded form?

• 800 + 7

• 80 + 7

• 8 + 0 + 7

• 800 + 70

What is the result of doubling 200?

• 4000

• 2000

• 400

• 20

What is the result of doubling 75?

• 150

• 75

• 750

• 1500

What is the function machine's rule if the input is 13 and the output is 4?

• Divide by 9

• Add 9

• Subtract 9

• Multiply by 9

If the output is 12 and we are reversing the function machine by subtracting, what was the input?

• 5

• 17

• 12

• 7

What happens to the numbers in the function machine if the rule is to subtract 50?

• They are divided by 50

• They are multiplied by 50

• They increase by 50

• They decrease by 50

How do you find the rule if you know the input and output?

• Multiply input by output

• Divide output by input

• Add input to output

• Subtract input from output

What is the rule if the input is 3 and the output after applying the rule is 6?

• Subtract 3

• Multiply by 2

• Divide by 2

• Add 3