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Eighteen Math Family - Page 1

Addition / Subtraction

the 18's family (Continued)

Activity

Color nine squares below one color and color the remaining squares a different color. How many squares did you color?

9 + 9 = ___________
                                   

Experiment

Do you still have your nouns from your bedroom, the frontroom, outside and other places?  

Great !

Take these nouns and sort them.  One pile should have 9 nouns and the other pile should have nine items.  How many nouns do you have altogether?

Special Note

With your 18 pennies, make one piles of 9 pennies and the other pile with 9 pennies.  How many pennies do you have in all?

Pile #1 = 9 pence
Pile #2 = 1 nickel and 5 pennies
How much money do you have altogether?

Do you remember ...

1 dime = 2 nickels
1 dime = 10 pennies
1 nickel = 5 pennies

Did you remember that the plural of penny is either pennies or pence?  

Did you know you have verified ...
9 + 9 = 18
and that you have picked up nouns!

A noun is the name of a person, place, thing, or idea.  It is hard to pick up an idea or place, but the other things you can frequently pick up !!!  

Name and count the nouns you
have picked up for your parents.

(Verify = test the correctness of something)

Practice

Nine swans were in the river and nine geese joined them.  How many waterfowl were there altogether?

9 + 9 = _______________ waterfowl

Anna has 9 pennies.  Her brother gave her nine more pennies.  How many pennies does Anna have now?

9 + 9 = _______________ pennies

Activity

Color nine squares below one color &
put a big red
X in each square.
Color the remaining squares a different color
How many squares do not have the big red
X?
18 - 9 = __________
                                   

Experiment

Do you still have your nouns from your bedroom, the frontroom, outside and other places?  

Great !

Take these nouns and put them in piles of eighteen.  Remove nine nouns.  How many items are left?  

Special Note

Make a pile with your 18 pennies.  Take away 9 pennies.  How many pence are left in the pile?

Pile #1 = 9 pence
Pile #2 = 1 nickel and 5 pennies
How much money do you have altogether?
Take away pile #1.
How much money remains?
Restore pile #1.
Take away pile #2.
How much money is left?

Did you remember that the plural of penny is either pennies or pence?  

Did you know you have verified ...
18 - 9 = 9
and that you have picked up nouns!

A noun is the name of a person, place, thing, or idea.  It is hard to pick up an idea or place, but the other things you can frequently pick up !!!  

Name and count the nouns you
have picked up for your parents.

(Verify = test the correctness of something)

Practice

Henry is 9 years old.  His brother, Morris, is 18 years old.  How many years older is Morris than Henry?

18 - 9 = _______________ years

Eighteen pigs were in the sty.  Nine were sleep.  How many pigs are awake?

 

18 - 9 = ________________ pigs

Well done !

Did you know you have verified ...

0 + 18 = 18     18 - 0 = 18
18 + 0 = 18     18 - 18 = 0

1 + 17 = 18     18 - 1 = 17
17 + 1 = 18     18 - 17 = 1

2 + 16 = 18     18 - 2 = 16
16 + 2 = 18     18 - 16 = 2

3 + 15 = 18     18 - 3 = 15
15 + 3 = 18     18 - 15 = 3

4 + 14 = 18     18 - 4 = 14
14 + 4 = 18     18 - 14 = 4

5 + 13 = 18     18 - 5 = 13
13 + 5 = 18     18 - 13 = 5

6 + 12 = 18     18 - 6 = 12
12 + 6 = 18     18 - 12 = 6

7 + 11 = 18     18 - 7 = 11
11 + 7 = 18     18 - 11 = 7

9 + 9 = 18     18 - 9 = 9
and that you have picked up nouns!

Do you remember:
A noun is the name of a
person, place, thing, or idea.  It is hard to pick up an idea or place, but the other things you can frequently pick up !!!  

Name and count the nouns you
have picked up for your parents.

(Verify = test the correctness of something)

Review

Add or Subtract !
 0 + 18 = ________  15 + 3 = ________
 18 + 0 = ________  3 + 15 = ________
 18 - 0 = ________  18 - 3 = _______
 18 - 18 = _______  18 - 15 = _______
 2 + 16 = _______  4 + 14 = ________
 16 + 2 = _______  14 + 4 = ________
 18 - 2 = _______  18 - 4 = ________
 18 - 16 = _______  18 - 14 = ________
 1 + 17 = _______  5 + 13 = ________
 17 + 1 = _______  13 + 5 = ________
 18 - 1 = _______  18 - 5 = _______
 18 - 17 = _______  18 - 13 = _______
 6 + 12 = _______  18 - 6 = ________
 12 + 6 = _______  18 - 12 = _______
 7 + 11 = ________  18 - 7 = ________
 11 + 7 = ________  18 - 11 = _______
  9 + 9 = ________  18 - 9 = ________

Do you remember that a noun is a name of a person, place, thing or idea?  Great !

Fill in the blank ...

A noun is the name of a person, place, thing, or ______________.

Tricky Question:  Verbally fill in the blank ...
Verify = test the ________________ of something

Tricky Question:  Verbally fill in the blank ...
Numbers are ad____________________________ because they tell about nouns.

Quickly
Repeat the Math Family combinations you just learned !!

Math Families:  Quickly repeat the families
0,18
 / 1,17,18 / 2,16,18 / 3,15,18
4,14,18 / 5,13,18 / 6,12,18 / 7,11,18
8,10,18 / 9,18

Be sure to review these math families frequently.  Have your child illustrate these families using any number of items found in the house ...

coins, m&ms, toys, shoes, buttons, etc.

Make flashcards out of index cards for your child for the math families.  Flash your child daily going quickly, cheerfully, and happily.

You may want to keep track with your child those facts he already knows with the Addition Chart and the Subtraction Chart.

 

Request:  Do you have recommendations for Addition/Subtraction? If so, e-mail us your ideas by clicking here

 

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