Vocabulary
What is a unit square that has an area of 1?
6 x 7 = 42
7 x ? = 42
6
There are 3 trays on a counter. Each tray has 8 plates. Write an addition equation AND a multiplication equation to find the number of plates on 3 trays.
8 + 8 + 8 = 24
3 x 8 = 24
When counting for area. Do you count the unit squares inside or outside of the figure?
Inside.
Draw equal groups to solve.
Luis buys 7 shirts that cost $3 each. What is the price of all of the shirts?
7 groups of 3
(See board)
$21
What is the answer to a multiplication equation called?
Product
4 x 9 = 36
9 x 4 = ?
36
Trey makes 4 groups of books. Each group has 9 books. How many books does Trey have? Show your work.
36 books
Evan uses unit squares to measure the area of a room that is in the shape of a rectangle. There are 3 rows of 8. What is the area of the room?
24 square meters
Use repeated addition to solve:
There are 5 teams competing in a race. Each team has 4 runners. How many runners are in the race?
4 + 4 + 4 + 4 + 4
20 runners
What is is called when each group has the same number of objects?
6 + 6 + 6 + 6 = 24
? x 6 = 24
4
Miroki uses 5 pieces of string to measure the length of a shelf. Each string is 9 centimeters long. What multiplication equation can you write to model the problem? What is the length of the shelf?
5 x 9 = 45
45 centimeters
45 square feet
Draw an array to solve:
There are 8 carrots growing in each row. There are 3 rows altogether. How many carrots are growing in the garden?
x x x x x x x x
x x x x x x x x
x x x x x x x x
24 carrots
Factors
4 x 9 = 36
? + ? + ? + ? = 36
9
Elise tells Reza she arranged bricks for a 9 x 4 walkway. Draw an array for the arrangement of bricks in Elise's rectangular walkway.
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
x x x x
How do you use multiplication to find are if there are no unit squares drawn inside?
Multiply length times width.
Write two multiplication problems(commutative property) that you could use to the solve:
Akani places tiles on a wall. She places 7 tiles in each row. There are 4 rows. How many tiles are on the wall?
4 x 7 = 28
7 x 4 = 28
What is the measure of the number of unit squares needed to cover a surface?
7 x 8 = ?
8 x 7 = ?
56
Misha write 5 storybooks. Each storybook has 7 pages. How many pages are in Misha's storybooks? Show your work.
35 pages
Harry draws a diagram to represent a figure he will use to make a mural. What is the area of the mural? Explain.
34 square feet
Use a number line to solve:
Jerome uses 4 paper clips to measure the length of a watch. Each paper clip is 5 centimeters long. How many centimeters long is the watch?
(see board for number line)
20 centimeters