Fact Families
Write the missing member of the fact family.
6, 8, 48
6 x 8 = 48
48 / 8 = 6
48 / 6 = 8
8 x 6 = 48
250 / 5 =
50
78 / 2 =
39
189 / 4 =
47 r 1
Write the missing member of the fact family.
10, 11, 110
10 x 11 = 110
11 x 10 = 110
110 / 10 = 11
110 / 11 = 10
What is the number that is being divided called?
The dividend.
600 / 60
10
99 / 8 =
12 r 3
43,505 / 7 =
6,215
There are 18 books that need to go on 3 bookshelves. Write the fact family that this represents.
3 x 6 = 18
6 x 3 = 18
18 / 3 = 6
18 / 6 = 3
What is the number that you are dividing by?
The divisor.
2400 / 120
20
546 / 3 =
182
Tami spent 345 minutes shoveling the snow off her driveway and 275 minutes shoveling the snow off her neighbor's driveway. How many total minutes did she spend shoveling snow? If she did this over 4 days, how many minutes per day did she shovel snow if she shoveled the same number of minutes each day?
620 minutes total shoveling snow
155 minutes a day
Can the number 24 be a part of more than one fact family? Explain why yes or no.
Yes! Many things multiply and divide to be 24 and to have 24 as a factor.
Ex) 2 x 12 = 24
3 x 8 = 24
4 x 6 = 24
What is the number that is leftover called?
The remainder.
Dan has 3,560 pencils that he needs to put into 20 cases. How many pencils go into each case?
178
2,367 / 5 =
473 r 2
Mr. Geary made 223 cupcakes for a school bake sale. 9 cupcakes fit in each cupcake container. How many containers will be full? How many containers will he need?
24 full containers
Will need 25 containers because there will 7 cupcakes left.
What is the goal of a fact family? Provide an example.
The goal is to have a group of related facts to relate multiplication and division.
ex) 4,5,20
4 x 5 = 20
5 x 4 = 20
20 / 4 = 5
20 / 5 = 4
What is a method of dividing where you break the dividend into sections that are easy to divide?
Partial Quotients.
What is the mistake in the following:
70,800 / 30 =
7,800 / 3 =
26,000
She added too many zeroes at the end.
7,800 / 3 = 2,600
Six polar bears weigh a total of 10,794. How much does each polar bear weigh, if they all weigh the same amount?
1,799 lbs
155 cards in each binder.
248 pages are needed.