Strategies for Finding Missing Numbers in Addition and Subtraction

The video tutorial helps students find missing numbers in math problems by using strategies like number bonds, drawing, and counting up. It explains the concepts of addition and subtraction, demonstrating how to solve problems with missing parts or wholes. The tutorial also applies these strategies to real-life scenarios, reinforcing the learning objectives.

What is the main idea behind addition in math?

• Taking away parts from a whole

• Putting parts together to make a whole

• Multiplying parts to get a whole

• Dividing a whole into parts

In a number bond, where is the whole number placed?

• At the bottom

• On the left side

• At the top

• In the middle

How can you find a missing part in an addition problem using a drawing strategy?

• Draw the whole as circles and color in the known part

• Draw the whole as triangles and color in the unknown part

• Draw the parts as circles and color in the whole

• Draw the parts as squares and color in the whole

What is the missing number in the equation: 13 - ? = 10?

• 5

• 4

• 3

• 2

Which strategy involves starting at a known part and counting up to the whole?

• Drawing strategy

• Counting down strategy

• Counting up strategy

• Number bond strategy

How many markers are missing if Will's brother has 13 out of 20?

• 8

• 5

• 6

• 7

What should you do if you don't know one of the parts in a number bond?

• Guess the missing part

• Subtract the whole from the known part

• Multiply the known part by two

• Start at the known part and count up to the whole