Properties
What is the commutative property?
It means you can add or multiply numbers in any order (e.g., (3 + 4 = 4 + 3)).
If you multiply a number by zero, what number do you get?
To make some appetizers, a cook needs to make 100 mini meat pies. She divided her crew into 2 teams. If the first team made 23, and the second made 41, how many pies should the third team make?
36
What does it mean to round a number?
It means to make a number simpler by adjusting it to the nearest ten, hundred, etc.
What is the formula for the perimeter of a rectangle?
Area = Length x Width
What is the associative property?
It means you can group numbers in different ways when adding or multiplying (e.g., ((2 + 3) + 4 = 2 + (3 + 4))).
Find the product of 3 x 8
Jade gathered all of her watercolor paintings. She thought of placing an equal number of paintings in 4 of the rooms in the house. If Jade has 32 watercolor paintings, how many paintings will be placed in each of the 4 rooms?
8
Round 67 to the nearest ten.
70
If a rectangle has a length of 4 inches and a width of 3 inches, what is the area?
12 inches squared
What is the distributive property?
It means you can multiply a number by a sum by multiplying each addend separately and then adding (e.g., (2 x 7) = (2 x 3) + (2 x 4).
What is the product of 13 x 8?
104
Dylan and his sister played swimming-pool-basketball. Each basket was worth 3 points. Dylan scored 9 points. His sister scored 6 points. What is the total number of baskets made during this game?
5
Estimate the sum of 48 and 37 by rounding.
50 + 40 = 90
What is the perimeter of a square with sides of length 5 feet?
20 feet
Give an example of the commutative property using multiplication.
5 x 2 = 2 x 5
What is the product of 25 x 14?
350
Last week Oliver had $107. He washed cars over the weekend and now has $198. How much did he earn washing cars?
$91
If you have 134 and you round it to the nearest hundred, what is it?
100
If a rectangle has an area of 20 cm and a width of 5 cm, what is the length?
100 cm squared
How do the associative and commutative properties differ?
The commutative property deals with the order of numbers, while the associative property deals with how numbers are grouped.
Show an area model to find the product of:
45 x 27
1,215
Soraya had to help her sister clean the kitchen. Soraya did the dished for 19 minutes, scrubbed the stove for 43 minutes, and mopped the floors for 38 minutes. Her sister help for a total of 56 minutes. How many minutes did Soraya and her sister clean the kitchen for?
156
Round the numbers to the closest 10 to find the total:
672+589=
1,260
Find the area of a shape with sides that are 14 cm long and 15 cm wide.
210 cm squared