3 & 4 as Factors
Which facts can you use to solve for a 3s fact?
2s facts and 1s facts
Which facts can be used to help solve for 6s facts?
5s facts and 1s facts; 2s facts and 4s facts, double 3s facts
What facts can be doubled to solve for your 8s facts?
Double 4s facts
What does the Associative (grouping) Property of Multiplication tell us?
It says that you can change the grouping of the factors, and the product will be the same.
Emilio bought 3 times as many pencils as Mark bout at the school store. If Mark bought 3 pencils, how many pencils did Emilio buy?
Give the multiplication sentence and answer the question in a complete sentence.
3 times 3 pencils; 3 x 3 = 9. Emilio bought 9 pencils.
Which facts can you double to solve for your 4s facts?
Double 2s facts
Which facts can be used to solve for 7s facts?
5s facts and 2s facts; 3s facts and 4s facts, 1s facts and 6s facts.
What is 8 x 3? Use double ______ facts to solve the problem.
4 x 3= 12 and 4 x 3 = 12; 12 + 12 = 24, so 8 x 3 = 24.
Solve for 5 x 2 x 3 by grouping the first two numbers together. Make sure to demonstrate each step.
5 x 2 x 3=
(5 x 2) x 3=
10 x 3=
30
Janine and Margo each have 5 notebooks. Each of the notebooks have 6 stripes on them. How many stripes are there altogether. Write a multiplication sentence and solve.
2 x 5 x 6
(2 x 5) x 6
10 x 6 = 60
Altogether there are 60 stripes.
What two facts can you use to solve 3 x 5? Give the facts and solve.
1 x 5 =5 and 2 x 5 =10; 5 + 10 = 15, so 3 x 5 = 15
Use ______ facts and ______ facts to solve for 6 x 12.
5 x 12 = 60 and 1 x 12 = 12; 60 + 12 = 72,
so 6 x 12 = 72.
What is 9 x 8?
72
Solve for 6 x 2 x 4 by grouping the second two numbers together. Make sure to demonstrate each step.
6 x 2 x 4 =
6 x (2 x 4) =
6 x 8 =
48
Explain how to find 9 x 12 on a multiplication chart. Then solve.
Go to the 9s column and then follow it down to the 12s row. Where they meet you will find the answer 9 x 12 = 108.
Solve for 4 x 7 by using double _____ facts.
2 x 7 = 14 and 2 x 7 = 14; 14 + 14 = 28, so 4 x 7 = 28
Use _____ facts and _____ facts to solve for 7 x 11.
5 x 11 = 55 and 2 x 11 = 22. 55 + 22 = 77, so 7 x 11 =77.
If 8 x 11 is 88, what can you do to find 8 x 12? Then solve the problem.
You can add one more 8 to 88. 88 + 8 = 96, so 8 x 12 = 96.
Solve for 3 x 5 x 4 by grouping the first and last numbers together. Make sure to demonstrate each step.
3 x 5 x 4 =
(3 x 4) x 5 =
12 x 5 =
60
Ahmed made a pattern with tiles. The first figure had 5 tiles, the second figure had 9 tiles, the third figure had 13 tiles. How many tiles will be in the fourth figure? What is the pattern?
There will be 17 tiles in the fourth figure because we added on 4 tiles to each figure from the one before.
Show how to use double 2s facts to solve 4 x 3.
2 x 4 =8, 1 x 4 = 4; 8 + 4 = 12, so 3 x 4 = 12.
2 x 3 =6, 2 x 3 = 6; 6 + 6 = 12, so 4 x 3 =12
How can you use 6 x 7 to find 7 x 6? What property can help you to solve this problem?
I know that 6 x 7 = 42 and the Commutative (order) Property of Multiplication says that you can multiply in any order and the product will be the same. So, if 6 x 7 = 42, then 7 x 6 = 42 because the factors are the same.
What is 8 x 6? Use double _____ facts to solve.
4 x 6= 24 and 4 x 6 = 24; 24 + 24 = 48, so 8 x 6 = 48.
Write three was to find 9 x 0 x 8.
9 x 0 x 8 = (9 x 0) x 8 = 0 x 8 = 0
9 x 0 x 8 = 9 x (0 x 8) = 9 x 0 = 0
9 x 0 x 8 = (9 x 8) x 0 = 72 x 8 = 0
Harry made 42 pancakes. He used 7 eggs and 5 cups of milk. Twelve of the pancakes were blueberry. The rest were banana. How many banana pancakes did he make? Choose an operation and solve the problem. Tell how you know that the operation you chose was correct.
The operation we should use is subtraction. 42-12 = 30. We should use subtraction because we know the total amount, that there are two types of pancakes, we know how many blueberry, so we need to find what is left = banana pancakes.