Distributive Property
What is one way I can break up a 7x4 array? The answer will be 2 multiplication sentences.
3X4 and 4X4
(Answers may vary)
How can you use 2X8=16 to find 3X8?
2X8 is a more friendly equation, which we can solve and add 8 more to.
How can we use 5 facts and 2 facts to help us multiply by 7?
5 and 2 can be added together to make 7, which are friendlier numbers than 7.
2X2X2=
8
How many combinations can be made with these shirts and pants?
Shirts: Green, Pink, Red, Yellow
Pants: Black, Blue
4x2=8 combinations
Does it matter where you break apart your array?
No. It can be on any line vertically or horizontally. No diagonals.
Mr. Torres had packages of tomatoes on the counter. Each package had 3 tomatoes in it. If Mr. Torres counted the tomatoes in groups of 3, which list shows the numbers he could have named?
A. 6, 12, 16, 19
B. 6, 9, 12 ,15
C. 3, 6, 10, 13
D. 3, 7, 11, 15
B: 6, 9, 12, 15
The students who are graduating are standing in 7 equal rows. There are 9 students in each row. How many students are graduating?
63 students.
What is a good way to solve multiplication problems with three factors?
Multiply two numbers first, take that product and multiply the last number.
How many combinations can be made with these pets and pet-sitters?
Pets: Cat, Dog
Sitters: Jill, Marta, Dave
2x3=6 combinations
What two facts can be added together to make up
5x4?
2X4 and 3X4
1X4 and 4X4
3X9 = ?
27
7X7=
49
Sarah has 4 quilt pieces. Each piece has 3 rows with 3 squares in each row. How many squares are in Sarah's quilt pieces?
36 squares.
Theo wants to choose one sandwich and one drink for lunch. There are three kinds of sandwiches: peanut butter, tuna, and turkey. There are three kinds of drinks: grape juice, milk, and orange juice. How many combinations of a sandwich and drink can be made?
9 combinations
Draw a 6X4 array broken up into two separate parts. Use circles. You will not get points if your lines are not even.
Answers will vary.
Nolan made lamps to sell at the school art show. He made 9 lamps each week for 4 weeks. How many lamps did Nolan make in all?
9X4=36 lamps
What are friendly numbers to help you break up 8's facts?
4 and 4
6 and 2
5x(2x7)=(5x2)x___=
7
Choose one of 3 hats and one of 8 books to bring on a camping trip.
24 combinations.
6X8=(4X__) + (2X8)
What is the missing piece?
8
Which statement best describes these three numbers? 9, 18, 27
A: They are all even numbers.
B: They are all multiples of 3.
C: They are all greater than 10.
D: They are all 2-digit numbers.
B: They are all multiples of three.
How can you use 4X7 to find 8X7?
Do 4X7 twice since it's half of 8.
At a park, there are 3 mockingbird nests with 4 eggs in each nest, and 2 more nests with 3 eggs in each. What is the total number of eggs?
18 eggs
What are two different ways that you can solve combination problems?
Make a table
Draw a picture
Multiply the two numbers