The video tutorial teaches how to add numbers within 20 using the counting on strategy. It begins with an introduction to addition, followed by a practical example involving balloons. The counting on strategy is explained, where you start with one number and count on from there. This method is particularly useful when one of the addends is small. The video concludes with instructions for an assignment and encourages students to rewatch the video or seek help if needed.

What is the main topic of the video?

• Subtracting numbers within 20

• Dividing numbers within 20

• Multiplying numbers within 20

• Adding numbers within 20

How many red balloons does Evan have?

• Three

• Five

• Seven

• Two

What does the plus sign in an addition sentence mean?

• Divide

• Add

• Multiply

• Subtract

What is the 'count on' method?

• Counting by twos

• Starting at one number and counting on from there

• Starting at zero and counting up

• Counting backwards from a number

If you start with five balloons and count on two more, how many do you have?

• Six

• Seven

• Five

• Eight

When using the 'count on' method, which number should you start with?

• Any number

• The smaller number

• Zero

• The greater number

What should you do if you need help with the assignment?

• Guess the answers

• Watch the video again or ask your teacher

• Ask a friend

• Ignore it