Understanding Expanded Form and Methods

The video tutorial for second graders focuses on solving a two-digit addition problem, 48 + 26, using different strategies. Initially, the teacher explains the direct addition method by adding the ones and tens separately. Then, the teacher introduces the place value method, breaking down numbers into tens and ones to simplify the addition process. Both methods arrive at the same answer, 74, demonstrating that multiple strategies can be used to solve math problems effectively.

What is the main focus of the math standard MBT nine?

• Using a single strategy to solve problems

• Memorizing math facts

• Using different strategies to solve problems

• Focusing only on subtraction

In the first method, which place value do we focus on first?

• Hundreds place

• Tens place

• Ones place

• Thousands place

What is the sum of 8 and 6 in the ones place?

• 12

• 13

• 15

• 14

Why do we carry over the '1' in the first method?

• To confuse students

• Because there can only be one digit in the ones place

• To make the problem easier

• Because it is a rule

What is the sum of 4, 1, and 2 in the tens place?

• 9

• 8

• 7

• 6

What is the second method introduced in the video?

• Using subtraction

• Breaking numbers apart by place value

• Guessing the answer

• Using a calculator

What is the value of the '4' in the number 48?

• 4000

• 400

• 40

• 4

What is the expanded form of 48?

• 4 + 8

• 400 + 80

• 48 + 0

• 40 + 8

What is the value of the '2' in the number 26?

• 2

• 20

• 200

• 2000

What is the expanded form of 26?

• 20 + 6

• 26 + 0

• 2 + 6

• 200 + 60