10 More, 10 Less | Math Song for Kids | Adding & Subtracting by 10 | Jack Hartmann

10 more, 10 less gives strategies for mentally finding 10 more or less than a two digit number without having to count or explain the reasoning used. Adding and subtracting by tens by adding or subtracting a one from the tens place.

Lyrics
What's ten more, what's ten less
You don't have to count or guess
What's ten less, what's ten more
Either way you'll know more sure

Take a number and what's 10 more
Get the answer right away
You don't have to count, worry or doubt
Add a 1 to the tens place

What's 10 more than 20?
Add a 1 to the tens place
Ten more than 20 is: 30 OK

What's 10 more than 50?
Add a 1 to the tens place
Ten more than 50 is: 60 OK

What's 10 more than 70?
Add a 1 to the tens place
Ten more than 70 is: 80 OK

What's 10 more than 10?
Add a 1 to the tens place
Ten more than 10 is: 20 OK

What's ten more, what's ten less
You don't have to count or guess
What's ten less, what's ten more
Either way you'll know more sure

Take a number and what's 10 less
Get the answer right away
You don't have to count, worry or doubt
Subtract a 1 from the tens place

What's 10 less than 20?
Subtract a 1 from the tens place
Ten less than 20 is: 10 OK

What's 10 less than 50?
Subtract a 1 from the tens place
Ten less than 50 is: 40 OK

What's 10 less than 70?
Subtract a 1 from the tens place
Ten less than 70 is: 60 OK

What's 10 less than 10?
Subtract a 1 from the tens place
Ten less than 10 is: 0 OK

What's ten more, what's ten less
You don't have to count or guess
What's ten less, what's ten more
Either way you'll know more sure

What's ten more, what's ten less
You don't have to count or guess
What's ten less, what's ten more
Either way you'll know more sure

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