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Counting in Groups of 10

1. Count in groups of TEN. Count ten dots, and circle them.
    Write how many “ten-groups” that you get. Write how many ones are left over.


 

 

  ten-
groups
ones
a.      

 

  ten-
groups
ones
b.      

  

  ten-
groups
ones
c.      

  ten-
groups
ones
d.      

  ten-
groups
ones
e.      

  

  ten-
groups
ones
f.      

2. Counting game 1. (Optional - to give more practice for making groups of ten.) Put some
    beans or other objects onto a table. Ask the child to make groups of ten. Then ask the child
    to count the groups of ten and the individual ones, using “four-tens and six” or “seven-tens
    and one”, etc. Repeat as necessary with a different amount of objects, taking turns.



3. Counting game 2. You need: Counting items, such as sticks, beads, or beans.
    Small bags or bowls, OR rubber bands if using sticks.

    Before the game: Place 10 of the items in the middle, and the rest in a pile on the side.

    Play: At his turn, each player adds one more item to the middle pile on the table, and names
    the number that is formed. Whenever a whole ten is fulfilled, those ten items are grouped
    together with a rubber band or by placing them in a small bag or bowl.

    ONLY use words one to ten when counting in this game. Words like eleven, thirteen, twenty,
    fifty etc. are not allowed. For example, eleven is said as “ten and one”, twelve is “ten and
    two”, twenty is “two tens”, twenty-five is “two tens and five”, etc.

    Variation: Each player adds two (or some other quantity) matches to the pile instead of one.

4. Introduce the 100-bead abacus to the student.
    Make these numbers with the 100-bead abacus.

    a. 6 tens, 5 ones

    b. 2 tens, 7 ones

    c. 7 tens

    d. 1 ten, 5 ones

   e. 2 tens, 1 one

   f. 8 tens, 9 ones 

   g. 9 tens, 3 ones 

   h. 1 ten, 1 one

 i. 4 tens, 6 ones

 j. 6 tens

 k. 7 tens, 1 one

 l.  1 ten, 8 ones

5. Take turns telling each other what number to make on the abacus,
    such as “7 tens and 9” or “1 ten and 7”. Do not proceed further until the student
    has mastered this! This is crucial.
 

The names of the numbers with whole tens are:

ten

two tens

three tens

=

=

=

ten

twenty

thirty

four tens

five tens

six tens

=

=

=

forty

fifty

sixty

seven tens

eight tens

nine tens

=

=

=

seventy

eighty

ninety

ten tens  =   one hundred 

6. Say the number names from ten to a hundred aloud a few times, while also making
    them with the 100-bead abacus. It almost sounds like a rhyme!



This lesson is taken from Maria Miller's book Math Mammoth Place Value 1, and posted at www.HomeschoolMath.net with permission from the author. Copyright © Maria Miller.


Math Mammoth Place Value 1

A self-teaching worktext for 1st grade that covers forming ten-groups, filling the 100-chart, breaking numbers to tens & ones, and comparing.

Download ($3.30). Also available as a printed copy.

=> Learn more and see the free samples!

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