Strategies for Addition and Subtraction

The video tutorial takes place in a park where friends are exercising. It covers solving addition and subtraction problems using different strategies. The first problem involves adding jumping jacks, using place value and tens facts. The second problem involves adding jump rope counts by breaking numbers into expanded form. The third problem is a subtraction problem comparing sit-ups, using a number line. The video emphasizes using strategies to simplify problems and encourages thinking about numbers in different ways.

How many jumping jacks did Chen and Sue do together?

• 40

• 30

• 20

• 50

What strategy was used to simplify the addition of 51 and 47?

• Using a calculator

• Guessing the answer

• Breaking down numbers into tens and ones

• Multiplying the numbers

How many jumps did Chen and Sue complete together?

• 98

• 88

• 118

• 108

How many more sit-ups did Chen do compared to Sue?

• 7

• 6

• 8

• 5

What tool can help visualize subtraction problems?

• A calculator

• A dictionary

• A number line

• A multiplication table

What is a key takeaway from the strategies discussed?

• Avoid using any tools

• Always use a calculator

• Use different strategies to simplify problems

• Memorize all math problems

What is the benefit of breaking numbers into expanded form?

• It makes numbers harder to add

• It is a method to avoid using a calculator

• It helps in visualizing and simplifying calculations

• It is only useful for subtraction