Long Multiplication

Front

What is long multiplication?

Back

Long multiplication is a method used to multiply larger numbers by breaking them down into smaller parts, multiplying each part, and then adding the results together.

Tags

CCSS.4.NBT.B.5

Front

What is the first step in long multiplication?

Back

The first step is to write the numbers vertically, aligning them by place value.

Tags

CCSS.4.NBT.B.5

Front

How do you multiply a single digit by a two-digit number?

Back

Multiply the single digit by each digit of the two-digit number, starting from the rightmost digit.

Tags

CCSS.4.NBT.B.5

Front

What do you do after multiplying the single digit by the two-digit number?

Back

You add a zero to the end of the result for the next place value and then multiply again if there are more digits.

Tags

CCSS.4.NBT.B.5

Front

What is the product of 18 and 94?

Back

1692

Tags

CCSS.4.NBT.B.5

Front

What is 13 x 3?

Back

39

Tags

CCSS.4.NBT.B.5

Front

What is the product of 17 and 75?

Back

1275

Tags

CCSS.4.NBT.B.5

Front

What is 30 x 100?

Back

3000

Tags

CCSS.4.NBT.B.5

Front

What is 22 x 4?

Back

88

Tags

CCSS.4.NBT.B.5

Front

How do you check your work in long multiplication?

Back

You can check your work by using the inverse operation, which is division, to see if the product divided by one of the factors equals the other factor.

Tags

CCSS.5.NBT.B.5