Vocab
a group of related facts using the same numbers
What is:
Fact Family
42/7=
6
7 x 6 =
42
The property that states the order you multiply doesn't change the sum. (Flip-flop)
Commutative Property of Multiplication
Saphira has 15 green ducks, 8 blue ones, and 4 yellow. If she puts them into 3 boxes equally, how many will be in each box?
what is the math sentence?
27/3=9
9 ducks
the number by which the dividend is being divided.
What is the divisor?
56/8=
7
9 x 7
63
The property that states any number multiplied by zero is zero.
There are 2 video games in each value pack. There are 6 value packs in each box. If Bo buys 3 boxes for his collection, how many video games will he have.
Write an equation to solve.
(2x6)x3 = 12x3 =36
OR
2x(6x3)= 2x18 = 36
Bo will have 36 video games
a number that is multiplied by another number
what is a factor?
36/6
6
write the 4 problems for this fact family:
3, 7, 21
3x7=21
7x3=21
21/3=7
21/7=3
The property that states when any number is multiplied by 1, the product is that number.
Identity Property of Multiplication
Miss Brown is arranging desks in her new classroom. There are 12 desks. How many ways can she arrange the desks so that the number in each row is the same? (Draw a model). (hint: decompose)
*See student drawings
1x12=12 /12x1
2x6=12 /6x2
3x4=12 /4x3
The desks can be arranged 3 differnt ways
the answer to a division problem
quotient
Use repeated subtraction to show:
25/5
5
see work
What are the factors for 16?
(make a "rainbow")
1, 2, 4, 8, 16
This rule is about when you divide 0 by any nonzero number, the quotient is 0.
Zeros in Division Rule
Annalita walks her dog 3 times a say. How many times does she walk her dog in 1 week? Find multiples of 3 to tell how many times Annalita walks her dog in 8, 9, & 10 days.
21 for 1 week
24 for 8 days
27 for 9 days
30 for 10 days
the answer to a multiplication problem.
product
Use repeated subtraction to solve:
49/7
7
See work
List the first 5 multiples of 12
0, 12, 24, 36, 48
This rule is when you divide any number by 1, the quotient is always the dividend.
When you divide any nonzero number by itself, the quotient is always 1.
The Ones in Division Rule
Miss Kasey has 24 cans of soup on a shelf. One way the cans can be displayed is 1x24. Think of the factors of 24 to identity all the ways the cans can be displayed.
2x12 12x2
3x8 8x3
4x6 6x4
24x1