what do we know about division? 16 ÷ 4 = _____ i can use what i know about multiplication
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What do we know about division? 16 ÷ 4 = _____ I can use what I know about multiplication to help me solve a division problem! I can think 4 x ? = 16 4 x 4 = 16, so 16 ÷ 4 = 4 . This works because of FAMILY OF FACTS!. Let’s try another. 25 ÷ 5 = _____ - PowerPoint PPT PresentationTRANSCRIPT
What do we know about division?
16 ÷ 4 = _____
I can use what I know about multiplication to help me solve a division problem!
I can think 4 x ? = 16
4 x 4 = 16, so 16 ÷ 4 = 4.
This works because of FAMILY OF FACTS!
Let’s try another.
25 ÷ 5 = _____
I can use what I know about multiplication to help me solve a division problem!
I can think ___ x ? = ___
___ x ____ = ____, so 25 ÷ 5 = _____.
This works because of FAMILY OF FACTS!
Talk this through with a partner.
36 ÷ 6 = _____
I can use what I know about multiplication to help me solve a division problem!
I can think ___ x ? = ___
___ x ____ = ____, so 36 ÷ 6 = _____.
This works because of FAMILY OF FACTS!
So let’s review...
Factor x Factor = Product
Product ÷ Factor = Factor
This works because of FAMILY OF FACTS!
Factor
Factor
Product
We know how to use arrays to multiply!
22 x 4
80 84
4 x 20 = ? 20 4 x 2= ?2
80 + 8 = 88.So 22 x 4 = 88.
We can also use an array to solve a division problem!
24 ÷ 4
244
4 x ? = 24 6
6 x 4 = 24So 24 ÷ 4 = 6.
We can also use an array to solve a division problem!
84 ÷ 4
80 44
4 x ? = 80 20 4 x ? = 41
20 + 1 = 21.4 x 21 = 84
So 84 ÷ 4 = 21.
We can also use an array to solve a division problem!
88 ÷ 8
80 88
8 x ? = 80 10 8 x ? = 81
10 + 1 = 11.8 x 11 = 88
So 88 ÷ 8 = 11.
We can also use an array to solve a division problem!
36 ÷ 3
30 63
3 x ? = 30 10 3 x ? = 62
10 + 2 = 123 x 12 = 36
So 36 ÷ 3 = 12.
We can also use an array to solve a division problem!
66 ÷ 3
60 63
3 x ? = 60 20 3 x ? = 62
20 + 2 = 223 x 22 = 66
So 66 ÷ 3 = 22.
Now let’s use arrays to help us solve some problems on our own!
96 ÷ 3 48 ÷ 4
88 ÷ 2 63 ÷ 3
Let’s check our answers!
96 ÷ 3 = 32 48 ÷ 4 = 12
88 ÷ 2 = 44 63 ÷ 3 = 21
90 6 40 8
80 8 60 3
3
2
4
3
30 2 10 2
40 4 20 1
+ +
+ +
Today we’ve been thinking about division.Division is all about sharing equally.
Ms. Santos owns a neighborhood grocery store.She has 56 apples to arrange in rows for her window display.She has room for 4 rows in her window.
How many apples will there be in each row if she puts the same number in each row?
Use color tiles to model this problem and solve it.
Today we’ve been thinking about division.Division is all about sharing equally.
Let’s share how we thought through this problem!
Could we solve Ms. Santos’ problem with an array?
56 ÷ 4
40 164
4 x ? = 40 10 4 x ? = 164
10 + 4 = 144 x 14 = 56
So 56 ÷ 4 = 14.
Let’s try another problem like this.
60 ÷ 5
50 105
5 x ? = 50 10 5 x ? = 102
10 + 2 = 125 x 12 = 60
So 60 ÷ 5= 12.
Let’s try another problem like this.
72 ÷ 6
60 126
6 x ? = 60 10 6 x ? = 122
10 + 2 = 126 x 12 = 72
So 72 ÷ 6= 12.
Let’s try another problem like this.
75 ÷ 5
50 255
5 x ? = 50 10 5 x ? = 255
10 + 5 = 155 x 15 = 75
So 75 ÷ 5= 15.
Let’s try another problem like this.
90 ÷ 6
60 306
6 x ? = 60 10 6 x ? = 305
10 + 5 = 156 x 15 = 90
So 90 ÷ 6= 15.
Problem: 52 ÷ 4 = ___ Problem: 64 ÷ 4 = ___
Problem: 57 ÷ 3 = ___ Problem: 66 ÷ 3 = ___
Let’s PRACTICE!
