The video tutorial explains a word problem involving Mrs. Grange's second grade class, which starts with 45 tennis balls. The problem involves subtracting 19 balls that are thrown over a fence and 6 balls that disappear. The tutorial guides through the subtraction process, including regrouping, to find that 20 tennis balls remain.

How many tennis balls does Mrs. Grange's class start with?

• 19

• 26

• 45

• 20

What is the first step in solving the word problem?

• Write down the given information

• Guess the answer

• Add the numbers

• Multiply the numbers

What operation is needed to find out how many tennis balls are left?

• Addition

• Multiplication

• Subtraction

• Division

Why is subtraction used in this problem?

• To find the total

• To find the difference

• To find the sum

• To find the product

How many tennis balls are thrown over the fence?

• 6

• 19

• 26

• 45

What is the result after subtracting the tennis balls thrown over the fence?

• 20

• 26

• 19

• 45

What is the purpose of regrouping in subtraction?

• To make numbers larger

• To add numbers

• To make subtraction easier

• To divide numbers

How many tennis balls disappear after the initial subtraction?

• 19

• 26

• 6

• 45

What is the final count of tennis balls after all losses?

• 26

• 20

• 45

• 19

What does the word 'disappear' imply in the context of the problem?

• Addition

• Subtraction

• Division

• Multiplication