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Multiplication

 

 

Learning to Multiply by 9s

Learning the 8s
 8 x 0 = 0  8 x 7 = 56
 8 x 1 = 8  8 x 8 = 64
 8 x 2 = 16  8 x 9 = 72
 8 x 3 = 24  8 x 10 = 80
 8 x 4 = 32  8 x 11 = 88
 8 x 5 = 40  8 x 12 = 96
 8 x 6 = 48  

 

A fun way to get used to the numbers you will be working with in this time table is to skip count ...

0, 8, 16, 24, 32, 40, 48, 64, 72, 80, 88, 96

Be sure to practice skip counting backwards !

96, 88, 80, 72, 64, 48, 40, 32, 24, 16, 8, 0

 

Give the answers, reading across the graph
 8 + 8 = ?  Two 8s = ?  8 x 2 = ?
 8 + 8 + 8 = ?  Three 8s = ?  8 x 3 = ?
 8 + 8 + 8 + 8 = ?  Four 8s = ?  8 x 4 = ?
 8 + 8 + 8 + 8 + 8 = ?  Five 8s = ?  8 x 5 = ?
 8 + 8 + 8 + 8 + 8 + 8 = ?  Six 8s = ?  8 x 6 = ?
 8 + 8 + 8 + 8 + 8 + 8 + 8 = ?  Seven 8s = ?  8 x 7 = ?

Give the answers, reading across the graph
 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ?  Eight 8s = ?  8 x 8 = ?
 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ?  Nine 8s = ?  8 x 9 = ?
 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ?  Ten 8s = ?  8 x 10 = ?
 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ?  Eleven 8s = ?  8 x 11 = ?
 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = ?  Twelve 8s = ?  8 x 12 = ?

Practice Problems

What is the cost of:
 three 8-cent hair clips?  six 8-cent bells?
 ten 8-cent pads of paper?  two 8-cent baskets?
 five 8-cent coloring books?  eleven 8-cent chocolate bars?
 twelve 8-cent stamps?  four 8-cent sticks of gum?
 seven 8-cent paint brushes?  eight 8-cent candy apples?
 nine 8-cent paint kits?  one 8-cent carmel apple?

See if you can give the answers quickly !
 8 x 0 = ?  8 x 3 = ?
 8 x 5 = ?  8 x 10 = ?
 8 x 11 = ?  8 x 12 = ?
 8 x 4 = ?  8 x 1 = ?
 8 x 2 = ?  8 x 6 = ?
 8 x 7 = ?  8 x 9 = ?
 8 x 8 = ?  8 x 12 = ?

What is the cost for:
 Eight 12-cent crayons?  Eight 9-cent ribbons?
 Eight 2-cent blocks?  Eight 4-cent horns?
 Eight 10-cent pictures?  Eight 5-cent kazoos?
 Eight 3-cent erasers?  Eight 7-cent pinwheels?
 Eight 6-cent balloons?  Eight 1-cent buzzers?
 Eight 8-cent bugs?  Eight 11-cent toy pirates?

 

How many are eight 0s?  Eight 1s?  Eight 2s?  Eight 3s?  Eight 4s?  Eight 5s?  Eight 6s?  Eight 7s?  Eight 8s?  Eight 9s?  Eight 10s?  Eight 11s?  Eight 12s?

 

Learning to Divide by 8s

Do you remember that the ÷ sign means divide?  When we see the ÷ sign we say divided by.  Division is a type of reversed multiplication. It just takes a wee bit of practice. (NOTE: 0 divided by any number equals 0)

 

Be sure to practice skip counting as it helps us to divide quickly ...

0, 8, 16, 24, 32, 40, 48, 64, 72, 80, 88, 96

Be sure to practice skip counting backwards !

96, 88, 80, 72, 64, 48, 40, 32, 24, 16, 8, 0

 

 8 ÷ 0 = 0  48 ÷ 8 = 6
 8 ÷ 1 = 8  56 ÷ 8 = 7
 8 ÷ 8 = 1  64 ÷ 8 = 8
 16 ÷ 8 = 2  72 ÷ 8 = 9
 24 ÷ 8 = 3  80 ÷ 8 = 10
 32 ÷ 8 = 4  88 ÷ 8 = 11
 40 ÷ 8 = 5  96 ÷ 8 = 12

Practice Problems

Give the missing numbers
 8 ÷ 8 = ?  56 ÷ 8 = ?
 16 ÷ 8 = ?  80 ÷ 8 = ?
 32 ÷ 8 = ?  24 ÷ 8 = ?
 88 ÷ 8 = ?   0 ÷ 8 = ?
 72 ÷ 8 = ?  96 ÷ 8 = ?
 64 ÷ 8 = ?  40 ÷ 8 = ?
 48 ÷ 8 = ?  64 ÷ 8 = ?

Quickly give the answers working across the graph
 8 = ? 8s

 8 = 8 x ?
  8 ÷ 8 = ?
 24 = ? 8s

 24 = 8 x ?
  24 ÷ 8 = ?
 32 = ? 8s

 32 = 8 x ?
  32 ÷ 4 = ?
 40 = ? 8s

 40 = 8 x ?
  40 ÷ 8 = ?
 48 = ? 8s

 48 = 8 x ?
  48 ÷ 6 = ?
 56 = ? 8s

 56 = 8 x ?
  56 ÷ 8 = ?
 64 = ? 8s

 64 = 8 x ?
  64 ÷ 8 = ?
 72 = ? 8s

 72 = 8 x ?
  72 ÷ 9 = ?
 96 = ? 8s

 96 = 8 x ?
  96 ÷ 8 = ?
 80 = ? 8s

 80 = 8 x ?
  80 ÷ 10 = ?
 88 = ? 8s

 88 = 8 x ?
  88 ÷ 8 = ?

 

8s Fact Family

 

0
 8 x 0 = 0  8 ÷ 0 = 0
 0 x 8 = 0  0÷ 8 = 0

1,8
 8 x 1 = 8  8 ÷ 1 = 8
 1 x 8 = 8  8 ÷ 8 = 1

2,8,16
 2 x 8 = 16  16 ÷ 2 = 8
 8 x 2 = 16  16 ÷ 8 = 2

3,8,24
  3 x 8 = 24  24 ÷ 3 = 8
  8 x 3 = 24  24 ÷ 8 = 3

4,8,32
 8 x 4 = 32   32 ÷ 8 = 4
 4 x 8 = 32  32 ÷ 4 = 8

5,8,40
 8 x 5 = 40  40 ÷ 8 = 5 
 5 x 8 = 40  40 ÷ 5 = 8

6,8,48
 8 x 6 = 48  48 ÷ 8 = 6
 6 x 8 = 48   48 ÷ 6 = 8

7,8,56
 8 x 7 = 56  56 ÷ 8 = 7
 7 x 8 = 56  56 ÷ 7 = 8

8,64
 8 x 8 = 64   64 ÷ 8 = 8

9,8,72
 8 x 9 = 72  72 ÷ 8 = 9
 9 x 8 = 72  72 ÷ 9 = 8

10,8,80
 8 x 10 = 80  80 ÷ 8 = 10 
 10 x 8 = 80  80 ÷ 10 = 8

11,8,88
 8 x 11 = 88  88 ÷ 8 = 11
 11 x 8 = 88  88 ÷ 11 = 8

12,8,96
 8 x 12 = 96  96 ÷ 8 = 12
 12 x 8 = 96  96 ÷ 12 = 8

 

When one thing or a number of things is divided into eight equal parts, each part is called one eighth.  One eighth is written 1/8.  We can find 1/8 of any number by dividing the number by 8.

 

What is:
(Hint: Read across the graph)
 1/8 of 8?  8 ÷ 8 = ?
 1/8 of 16?  16 ÷ 8 = ?
 1/8 of 24?  24 ÷ 8 = ?
 1/8 of 32?  32 ÷ 8 = ?
 1/8 of 40?  40 ÷ 8 = ?
 1/8 of 48?  48 ÷ 8 = ?
 1/8 of 64?  64 ÷ 8 = ?
 1/8 of 56?  56 ÷ 8 = ?
 1/8 of 72?  72 ÷ 8 = ?
 1/8 of 80?  80 ÷ 8 = ?
 1/8 of 88?  88 ÷ 8 = ?
 1/8 of 96?  96 ÷ 8 = ?

What is ...
 1/8 of 16 trees?  1/8 of 32 pools?
 1/8 of 72 shrubs?  1/8 of 8 swings?
 1/8 of 56 gardens?  1/8 of 88 slides?
 1/8 of 24 ponds?  1/8 of 64 climbing bars?
 1/8 of 80 sprinklers?  1/8 of 40 picnic tables?
 1/8 of 96 hoses?  1/8 of 56 ropes?
 1/8 of 48 sandboxes?  1/8 of 16 bugs?

What is ...
(Hint: Do multiplication first then the addition)
 8 x 2 + 1 ?  8 x 8 + 2 ?
 8 x 4 + 5 ?  8 x 3 + 4 ?
 8 x 12 + 1  8 x 5 + 1 ?
 8 x 1 + 4 ?  8 x 10 + 3 ?
 8 x 7 + 1 ?  8 x 11 + 2 ?
 8 x 10 + 1 ?  8 x 6 + 2 ?
 8 x 9 + 3 ?  8 x 0 + 5 ?

 

 

Before you go on to the 9s times tables, be sure to ...

 

1)  Review your skip counting for all the times tables you have done so far
... frontwards and backwards

2) Have your daddy, mama, sister, or brother flash
you all the multiplication/division facts you have learned.
See how fast and accurate you can be !

3) complete the Multiplication Chart for
what you already know !

 

 

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