Exploring 2 by 2 Digit Multiplication Strategies

The video tutorial explains how to multiply two-digit numbers using the window method, also known as an open array. It involves breaking numbers apart, calculating partial products, and then adding them to find the final result. The tutorial emphasizes the importance of lining up numbers correctly when adding.

What is the first step in solving the problem 63 * 45?

• Subtract the numbers

• Add the numbers

• Multiply the numbers directly

• Draw a window (open array)

Tags

CCSS.4.NBT.B.5

What is another name for the window method?

• Closed array

• Box method

• Open array

• Grid method

Tags

CCSS.4.NBT.B.5

How do we break the number 63 apart?

• 60 and 3

• 6 and 3

• 6 and 30

• 60 and 30

Tags

CCSS.1.NBT.B.2B

CCSS.1.NBT.B.2C

What is the result of 60 * 40?

• 360

• 3600

• 240

• 2400

Tags

CCSS.4.NBT.B.5

How do you calculate 60 * 5?

• 60

• 600

• 30

• 300

Tags

CCSS.4.NBT.B.5

What is the result of 3 * 4?

• 14

• 12

• 10

• 7

Tags

CCSS.3.OA.C.7

What is the result of 3 * 5?

• 15

• 12

• 8

• 10

Tags

CCSS.3.OA.C.7

What is important when adding the numbers up?

• Line them up in the tens column

• Line them up in the hundreds column

• Line them up in the ones column

• Line them up in the thousands column

Tags

CCSS.2.NBT.B.7

What is the final result of 63 * 45?

• 2800

• 2835

• 2845

• 2850

Tags

CCSS.4.NBT.B.5