Fact families
What is the inverse of addition?
subtraction
ones
Round this number to the nearest 100:
4,708
4,700
If I need 60 christmas ornaments for my tree, and 4 come in each box, how many boxes will I need to buy?
60/4= 15boxes
Ohioooooooo!
What is the inverse of division
multiplication
when using expanded multiplication for this problem, what would be my next step?
231x75
200 30 1
70 5
1x5=5
Round this number to the nearest 100:
77,945
77,900
The total cost of coats for 3 kids was $315. How much was each coat if they all cost the same amount?
$315/3= $105 for each coat
How old is Miss Danielle?
25
complete the fact family
7+_=15
15-_=7
8
when using expanded multiplication for this problem, what would be my next step?
231x75
200 30 1
70 5
----------------
5
30x5=150
Round this number to the nearest 10:
5,672
5,670
I have 12 cookies and will be putting 3 onto each plate. How many plates do I need?
12/3=4 plates
Why was six afraid of seven?
Because seven eight nine = seven ‘ate’ nine
complete the fact family
9x_=72
72/_=9
8
solve 182x4 using expanded multiplication
2x4=8
80x4=320
100x4=400
728
round this number to the nearest 1,000:
239,864
240,000
I brought 55 candy canes for the 6 students the share in class. If everyone gets the same amount, will there be enough?
no, 55/6=9.16666667 so it would not be an equal amount for everyone.
Where does the grinch live?
Whoville
(Mount Crumpit)
extended this fact by 2 powers of ten
4x6=24
400x6=2,400
solve 1652x3 using expanded multiplication
2x3=6
50x3=150
600x3=1,800
1,000X3= 3,000
6+150+1,800+3,000= 4,956
round this number to the nearest 10,000:
56,999
57,000
I have 19 pairs of elf ears and 9 students. Is there enough for everyone to have 2?
Yes, 19/9=2.11111111 which means everyone will get 2 with one left over.
What is the capital of Louisiana?
Baton Rouge