IXL | Box multiplication | 4th grade math

Use the box method to find

Calculate the sums on the right. Add these sums to find

= ?,???

30+

1,200

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question

Use the box method to find

Calculate the sums on the right. Add these sums to find

= ?,???

30+

1,500

key idea

Box method of multiplication:

Step 1: Make a table with the place values of the first factor along the top and the place values of the second factor down the left.

Step 2: Multiply the place values and enter their products in the table.

Step 3: Sum each row of the table.

Step 4: Add these row sums. This is the product of the original factors.

solution

Step 1

To multiply two numbers using the box method, make a table with the place values of the first factor along the top and the place values of the second factor down the left.

(

)

(

)

Step 2

Multiply the place values and enter their products in the table.

Simplify the table.

1,500

Step 3

Sum each row of the table.

1,500

1,560

Step 4

Add these row sums. This is the product of the original factors.

1,560

So,

1,560

Looking for more? Try these:

Lesson: Writing numbers in expanded form

Lesson: Multiplying multiples of 10

Lesson: Multi-digit addition

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Teacher tools

Work it out

Not feeling ready yet? These can help:

F.1Multiplication facts to 10

U.2Multiply by a multiple of ten

D.3Add two multi-digit numbers

A.5Convert between standard and expanded form

Lesson: Writing numbers in expanded form

Lesson: Multiplying multiples of 10

Lesson: Multi-digit addition

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