Find the Unknown
3 x 4 = k
k = ?
k = 12
There is are 24 crayons shared between 6 students. How many crayons does each student get?
Each student gets 4 crayons.
All multiples of 10 have which digit in the ones place?
0
Commutative Property:
4 x 3 = ___ x ___
4 x 3 = 3 x 4
3 ones x 2 tens = ___ tens
6 tens = 60
5 x b = 20
b = ?
b = 4
Mr. Abbot buys 7 boxes of granola bars for a party. Each box has 8 granola bars. After the party he has 17 left. How many granola bars were eaten.
39 granola bars were eaten at the party.
All multiples of 5 have which two digits in the ones place?
5 and 0
Distributive Property:
7 x 4 = (2 x 4) + ( ? x 4)
7 x 4 = (2 x 4) + ( 5 x 4)
7 tens x 3 ones = _____
21 tens = 210
21div3 = f
f = 7
There are 80 plants in Henry's garden.
What does the sum of the digits for every multiple of 9 equal?
9
Associative Property:
(10 x 4) x 6
(Move the parenthesis)
10 x (4 x 6)
10 x (5 x 3) = ?
150
m div 6 = 3
m = 18
There are 28 pins and 22 stickers in a bag. If Joanna wants her seven friends to get a bag. What is the total number of pins and stickers?
There are 350 pins and stickers.
5 x 9 = 45
Use the plus 10 - 1 method to solve
6 x 9
45 + 10 = 55
55 - 1 = 54
7 x 12 = 6 sevens + ? = m
6 sevens + 6 sevens
42 + 42
= 84
20 x 6 = n
n = 120
42 div g = 6
g = 7
Celia sells calendars for a fundraiser. Each calendar costs $9. She sells 16 calendars to her family and 14 calendars to her neighbors. Her goal is to ear $300. Does Celia reach her goal? If not, how much is she off?
No she does not reach her goal. She is $30 off.
Define the 0's and 1's patterns:
n x 1 = ?
n x 0 = ?
0 div n = ?
n div 1 = ?
n div ? = 1
n x 1 = n
n x 0 = 0
0 div n = 0
n div 1 = n
n div n = 1
Define the three properties (you can write an example)
Answers may vary!
6 x 70 = j
j = 420