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Math Sites

Listed below are some great sites that will not only help your child master the basic facts but many other important math concepts as well. Have fun!
 Worksheets
 Time Practice  AAA Math 
 Coolmath4Kids  Wild on Math
 Math Magician  Tic Tac Toe
 Math Glossary  AplusMath  
 Test Prep Practice  Math Quizzes  
 Flashcards for Addition   That's a Fact 
 Flashcards for Subtraction  
 Math Baseball  Math Journey 
 Math Fact Cafe  Kidport 
Speed Challenge Funbrain Measuring
 More Math Facts  Houghton Mifflin-resouces and online text (some pages)
Math-Measurement
Math-Length, mass, capacity
Division
Think Central

Regrouping DirectionsTop of Page

When I teach regrouping to the class, I follow a certain procedure and dialogue each and every time I teach a lesson. I thought it might be helpful if I included it on our webpage so that you can see how we do it at school. I hope it will make it easier for you and your child at home as well.

I am numbering the steps for you, however, I normally do not say this is step 1, step 2, etc. with the students.
Students provide the answers after each question.

1. Draw an arrow above the one's column. (not shown)

2. Add the one's column first. Write the sum to the side.        35
                                                                                        +18     *13

3. Is 13 a two-digit number? Yes  Can we have a 2-digit number in the one's column? No

4. What do we need to do?   Regroup

5. Where do we regroup to? The ten's column

6. What do we do with the 3 ones? The 3 stays in the one's column.     35
                                                                                                       +18    13
                                                                                                           3

7. Regroup the one ten and write it above the ten's column.                1
                                                                                                         35
                                                                                                       +18     13      
                                                                                                           3

8. Add the ten's column.                                                                    1
    One ten plus three tens plus 1 ten                                                  35
    equals five tens.                                                                          +18       13
                                                                                                        53

9. What is the total sum? 53

10. Why don't we need to write the 0 for 50? 0 is a placeholder and there already is a number in the one's column.        

*Students write the sum to the side to avoid confusion. It's easier for them to have that visual reminder so that the number in the one's column stays in the one's column and the tens go the ten's column.
                                          

Regrouping for Subtraction DirectionsTop of Page

When I teach regrouping to the class, I follow a certain procedure and dialogue each and every time I teach a lesson. I thought it might be helpful if I included it on our webpage so that you can see how we do it at school. I hope it will make it easier for you and your child at home as well.

I am numbering the steps for you, however, I normally do not say this is step 1, step 2, etc. with the students.
Students provide the answers after each question.

                                      45
                                    - 27

1. Is 45 greater than 27? Can I give you 27 pencils if I have 45?

2. What do we need to do first?    Circle the five (The five is bolded here.)

3. Why?        So we start in the one's column at the top. 

                                            
                                      4 5
                          - 2 7

4. Is five greater than 7?            No.

5. What do we need to do?        Regroup.

6. From where?        Ten's column

7. How many do we always regroup, no matter what?        1 ten

8. Cross out the 4.

9. How many tens are left?        3 tens       

10. Write it above the 4 tens.


                                     3
                                     4 5
                          - 2 7

11. What do we do with the 1 ten we just regrouped?       Regroup to the one's column and add.

12. How many ones do we have now?        15 ones

13. Cross out the 5 and write 15 above it.

                           3 15
                             4 5
                          - 2 7

14. Is 15 greater than 7?         Yes.

15. Subtract. What is the difference?        8

16. What do we do next?        Subtract the ten's column.

17. What is the difference?        1 ten

                              3 15
                              4 5
                           - 2 7
                             1 8


18. What is the total difference?        18

19. Are we finished?         No, we need to check.

20. Is 18 less than 45?        Yes!!!


                
                              
      




Estimating, Nearest ten, About How Many Top of Page

All three terms are used in the same way in second grade. Below are the directions/procedures that I use at school.

*When we are estimating, finding the nearest ten, or about how many, the digit in the one's column will always be a zero.

1. I asked the students to think of a number line from 0 to 10.     0    1    2    3    4    5    6    7    8    9    10

2. Five is the "magic" number. Any number below 5 in the one's column goes to the lowest ten. 5 and higher goes to the highest ten.

3. Let's look at the number 41.  

4. 4 is already in the ten's column and the next highest ten is 50. So our only two choices are 40 and 50.

5. What digit is in the one's column in the number 41?   
 
6. Is 1 less than or greater than 5? less than

7. The closest nearest ten is 40.


*Here is a chart you may want to use as well. 

    Rounding (Steps Chart)

    Hundreds Chart for Rounding

  Rounding Video with Steps

GlyphsTop of Page