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starMay 2013

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The ideas in this addition lesson are taken from Add & Subtract 3 ebook. Only a few examples of each problem type are shown; you should make more problems of each kind for the student.


Carrying to tens and to hundreds
Free lesson plan from HomeschoolMath.net

               

           +         

        
 = 

 
     
     

hundreds
 1   

tens
1

ones
  

 1

 4

 5

+

   

7

 9

 

 2

 2 

 4 

 100
40
5

+


70
9

=

100
110
14
= 200
20
4
Ones make a ten and over.  The tens make one hundred and more.  
You have to carry to the tens and to the hundreds.  You have to carry two times.

 

Circle ten ones to form a 10-pillar. Then circle ten ten-pillars to form a new hundred. Notice how the tens' column ends up having no tens in the answer.
 

 
           
         

+

 
   
             

  =      
 
       

hundreds
 1   

tens
1

ones
  

1

  6

 6

+

 1 

 3

 8

 

 3

  0

 4 

 100
60
6

+

 100
30
8
=

200
90
14

= 300
0
4



Example problems

1.  Follow the example.  Add and break down as needed.

Two numbers to
add.
Add hundreds.
Add tens.
Add ones.
Break down to
hundreds, tens,
and ones
Count hundreds.
Count tens.
Count ones.

300
60
6

+   200
70
8
=

500
130
14

= 500
100 + 30
10 + 4
= 600
40
4
Two numbers to
add.
Add hundreds.
Add tens.
Add ones.
Break down to
hundreds, tens,
and ones
Count hundreds.
Count tens.
Count ones.

700

20

8

+   100

90

8

=

____

____

____

= ____

___ + ___

___ + ___

= ____

____

____

600

60

8

+   100

60

4

=

____

____

____

= ____

___ + ___

___ + ___

= ____

____

____

 

2.  Add.  Carry two times if necessary.

704 
+   156 
 
260 
+   341 
 
248 
+   376 
 
173 
+   646 
 
493 
+   348 
 

 

3.  Word problems.  Write mathematical sentence(s) for each.

a)  The family is making vacation plans.  They plan to drive from home to Wibbleton, which is 214 miles, then from Wibbleton to Wobbleton, which is 178 miles, and then from Wobbleton to home, which is 321 miles.  Draw a picture of the trip.  

How many miles total would the family drive? 
 

f)  You need 110 beads to make a short necklace and 170 beads to make a long one.  You have 600 beads.  How many and what kind of necklaces can you make?
g)  One side of the property is 156 yards and another side is 272 yards.  The property is a rectangle in shape.  How long a distance do you walk if you go all around it once?
 

 

           What numbers are missing from the additions?
 
   3   
+ 1    9

3

9

1

2     
+    3 6

5

1

7

1 6 9
+    5   

7

  

4

   8 8
+ 7      

9

0

0

Hooda Math

Free math worksheets and practice - Adapted Mind

Practice makes perfect. Practice math at IXL.com


New! Times Tales is now on DVD!

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