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Adding and Subtracting by 10 and 100

Numberock's Adding and Subtracting by 10 and 100 Song
Gerry takes us on a walk to the park to use his sidewalk chalk to add by 10 and 100 on the wall at his favorite park. Then he takes a stroll by the docks to practice adding by 10 and 100, where he gets some sage advice about adding to the tens place and adding to the hundreds place from a fisherman bringing home his daily catch.

Grades Targeted | 2nd - 3rd Grade

Adding and Subtracting by 10 and 100 Lyrics

Verse One
I took my dog in my bag with my sidewalk chalk
and headed to the park on a morning walk.
When I arrived, I drew base ten blocks...
one hundred eighty-one with my sidewalk chalk.

Drew one ten, did the addition,
and drew the sum - one hundred ninety-one.
Then subtracted the ten - reversing what I’d done -
made a difference… one hundred eighty one.

Did you know that when you add or subtract by a multiple of ten, the ones place always stays the same.

Now I’m imagining adding one hundred instead;
in my mind I can see another one hundred.
And in my thoughts, I see the sum
would be two hundred eighty one.

Now if I subtract one hundred from that sum, the difference will become
the original number - one hundred eighty one.

I can do the math in my head
to add or subtract ten or one hundred.
I Just imagine base ten blocks,
and give some thought to how many I’ve got…

Verse Two
On my cell phone down on the docks,
I made three hundred twenty-four with base ten blocks.
On the screen, I added one ten more,
and the sum was three hundred thirty-four .

Now I’ll take away the ten with subtraction
on my screen, I see the difference
is three hundred twenty-four,
the same number as before.

Think about this: when we add or subtract by 10, the ones place never changes.

Now, I’ll add one hundred instead;
with a square representing one hundred.
I add it up to find the total score
is the sum four hundred twenty-four.

Now I’ll take away one hundred with subtraction...
on my screen, I see the difference
is three hundred twenty-four -
the same number as before.

Think about this: when we add or subtract by 100, the ones and tens places stay the same.

Learn More

Who couldn't use a list of unique activities that can help your students better conceptualize what's actually happening when they are adding by 10 and 100? Check out this awesome resource list which might give you an idea or two that extends beyond Numberock's song and associated lesson resources.

For those that care about this stuff, the song you just watched aligns to the 2nd Grade Common Core learning standard 2.NBT.8. Check it out HERE. Because let's be honest, who doesn't love reading math standards in their leisure time?

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