Subtracting Groups in 3rd Grade Math

The video tutorial for third graders covers lesson 312, focusing on multiplication by adding groups. Students are guided through warm-up exercises, sketching, and problem-solving activities using toy tricycles and cars. The lesson emphasizes understanding multiplication through visualization and helper facts, encouraging students to use their math journals for practice.

What items are required for the math activity?

• Whiteboard, marker, math book, laptop

• Math book, journal, pencil, whiteboard, marker, eraser

• Notebook, pencil, eraser, calculator

• Math book, calculator, ruler, eraser

What is the result of multiplying 2 by 5?

• 10

• 12

• 8

• 14

If you add one more group of 2 to 2 times 5, what do you get?

• 12

• 10

• 16

• 14

What is the result of 10 times 3?

• 20

• 40

• 50

• 30

What is the result of adding one more group of 10 to 30?

• 40

• 20

• 30

• 50

What is the result of 4 times 5?

• 20

• 25

• 15

• 10

How many wheels are there in total if Danielle has 10 toy tricycles, each with 3 wheels?

• 36

• 33

• 30

• 27

What is the multiplication model for 10 toy cars each having 4 wheels?

• 10 times 6 equals 60

• 10 times 5 equals 50

• 10 times 3 equals 30

• 10 times 4 equals 40

After removing one toy car, how many wheels are left if each car has 4 wheels?

• 36

• 40

• 34

• 38

What is the result of 4 times 7 using the helper fact of 5 times 7?

• 28

• 35

• 30

• 25