EXPANDED ALGORITHM

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STEP-BY-STEP

Step 1

Multiply the bottom right digit (7) with each digit on the top (40 and 3) to find the first 2 partial products

Step 2

Multiply the digit on the bottom left with the two digits on the top (40 and 4)

Step 4

Add all partial products to find your answer

Step 1

Multiply the bottom right digit (7) with each digit on the top (40 and 3) to find the first 2 partial products

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STEPS OF THE LATTICE MODEL

STEP 1

Multiply the bottom right digit with each digit on the top to find the first two partial products

STEP 2

Multiply the digit on the bottom left with the two digits on the top

STEP 3

Line up each partial product and prepare them to add together

STEP 4

Add all partial products to find your answer

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To practice what you have learned, click HERE to take a progress check.

Helpful hints:

If you got 80/100 points, it might be time to move on to the next method.

If you got less than 80/100 points correct, re-watch the videoes and go over the steps, then try again.

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HOW TO MULTIPLY

There are several different ways to multiply. We are going to be learning a few of these methods. Click on the "Learn More" buttons under each description to learn more and how to use it.

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LATTICE MODEL

Although it looks very different to the multiplication we are used to, once you start to use it, you'll see how simple it is.

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