M34
Double Digits 1
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If it’s double digits then you have to carry over
If it’s over 9 then you have to carry over
Take the other number next door and put it over the other two numbers add it up and then it’s over
Everybody round up, it’s so much work around us
I’ve got some Bridge the Gap book that I need to count up
Ship it to the school to classrooms plus they know nodal
Before I mail the books off, I have to know the total
17 in this class 15 in the other
How many book is that in all, let’s discover
Grab a piece of paper write 17 down
Write 15 over 17 now
If you did it right you should have two columns
5 over 7, 1 over 1
Let’s start with the first row to figure out the problem
5+7 let’s find out the sum
8, 9, 10, 11, 12 that’s it
But there’s no room to make the whole 12 fit
So, we leave the 2 then we carry over
The 1 to the next column, stack it over the 1 and the 1
Add them all let’s see, 1+1+1=3
Put them both together it equals 32 book that I have to ship out to the school
We know what we’re doing
We know what we’re doing
Numbers carried over, we call that regrouping
We know what we’re doing
We know what we’re doing
Numbers carried over, we call that regrouping
The first row is one
The second row is ten
If its triple digits then a row is added in
Third row is hundreds
Here’s the understanding, carry over add up the last row standing
If it’s double digits then you have to carry over
If it’s over 9 then you have to carry over
Take the other number next door and put it over the other two numbers
Add it up and then it’s over
If it’s double digits then you have to carry over
If it’s over 9 then you have to carry over
Take the other number next door and put it over the other two numbers
Add it up and then it’s over
We know what we’re doing
We know what we’re doing
Numbers carried over, we call that regrouping
We know what we’re doing
We know what we’re doing
Numbers carried over, we call that regrouping
Standards
- CCSS.MATH.CONTENT.1.NBT.B.2 — Understand that the two digits of a two-digit number represent amounts of tens and ones.
- CCSS.MATH.CONTENT.2.NBT.B.6 — Add up to four two-digit numbers using strategies based on place value and properties of operations.
- CCSS.MATH.CONTENT.2.NBT.B.5 — Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
- CCSS.MATH.CONTENT.2.NBT.B.7 — Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
- CCSS.MATH.CONTENT.1.NBT.C.4 — Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.