Area Models & Arrays 2 digit by 2 digit multiplication

Front

What is an area model in multiplication?

Back

An area model is a visual representation of multiplication that shows how to break down numbers into parts to find the product.

Tags

CCSS.4.NBT.B.5

Front

What is a partial product?

Back

A partial product is the result of multiplying one part of a number by another part of a number in a multiplication problem.

Tags

CCSS.3.OA.A.1

Front

How do you find the area of a rectangle?

Back

To find the area of a rectangle, multiply its length by its width.

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

What is the product of 11 x 29 using an area model?

Back

The product is 319, found by breaking it down into partial products: (10 x 20) + (10 x 9) + (1 x 20) + (1 x 9).

Tags

CCSS.4.NBT.B.5

Front

What does the expression (17 x 10) + (17 x 5) represent?

Back

It represents the distributive property, breaking down 17 x 15 into two easier multiplications.

Tags

CCSS.6.NS.B.4

Front

What is the first step in using an area model for 2-digit multiplication?

Back

The first step is to break each number into tens and ones.

Tags

CCSS.4.NBT.B.5

Front

If Abby raked leaves 23 times and earned $15 each time, how do you calculate her total earnings?

Back

Multiply 23 by 15 to find her total earnings: 23 x 15 = $345.

Front

What is the area model for 14 x 21?

Back

Break it down into (10 x 20) + (10 x 1) + (4 x 20) + (4 x 1) to find the product.

Tags

CCSS.4.NBT.B.5

Front

What is the product of 14 x 21?

Back

The product is 294.

Tags

CCSS.4.NBT.B.5

Front

How can you check your multiplication using an area model?

Back

You can add the partial products together to see if they equal the total product.

Tags

CCSS.4.NBT.B.5