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2-Digit by 2-Digit Multiplication Song

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Video Description:

Follow Stan the Man on a tour through his house and yard as he solves 2-digit by 2-digit multiplication problems with his best friends, Ben & Stella. They'll teach you all about how to do long multiplication with 2 digits while Stan's stuffed animal will shed light on what do to with decimal numbers.

2-Digit by 2-Digit Multiplication Song Lyrics:

Here is how you multiply fifty-nine by twenty-five;
Five times nine is forty-five; carry the four and write the five.
Five times five is twenty five;
then add the four and its twenty-nine.
We write a zero when we multiply the tens.
Two times nine is eighteen;
write the eight, but the one carries.
Five times two equals ten;
then add the one and you get eleven.
Add the numbers up, and that is the product.
I said, "Add the numbers up, and that is the product."

We need to write a zero when we multiply the tens.
Add the numbers up, and that’s the product.

Now coming on the scene is twenty-three times nineteen.
Three times nine is twenty-seven;
write the seven, carry the tens.
Two times nine is eighteen; add the two and get twenty.
Then write a zero when... we multiply the tens.
Three times one is three - two times one is two -
and now we know just what to do...
add the two numbers up and then
get four hundred thirty-seven.
Add the two numbers up and then
get four hundred thirty-seven.
add the two numbers up and then...

When we do long multiplication
we check it with the inverse operation.
The product becomes the dividend.
The divisor is the multiplier or multiplicand.
Then computing with precision, we do the long division;
if the quotient is the other factor,
then we know we’ve got the right answer.

I’m a stuffed animal and I’m here to tell you that...
If the numbers contain decimals, the extra work is minimal.
Simply multiply everything like before,
and there’s just one step more.
Count the number of decimal places,
then move left in the product that many spaces;
that’s where the decimal point’s written,
and every space to the left is dividing by ten.

Learn More

This song targets TEKS and Common Core learning standards from both 4th Grade and 5th Grade. Look into the relevant standards here, or dig deeper into Long Multiplication here.

If you are interested in getting ideas on how to plan a robust standards-aligned telling time lesson, we recommend checking out Instructure's recommendations for common core standards 4.NBT.5, and 5.NBT.5 . These pages help break down standard language, lay out the grade-appropriate level of rigor for each concept, and offer a variety of suggestions for activities (lesson seeds) that help students achieve their learning targets.

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4.NBT.5 5.NBT.5