Writing Expressions
Write an expression to describe this statement:
To solve 18 x 20, I double 18 and then multiply by 10
(18 x 2) x 10
OR
36 x 10
Write an equation
To find 7 times 32, I double and halve
14 x 16 = 224
What is the equation used to find volume?
l x w x h = V
(length x width x height = volume)
5 vans
Evaluate the expression
5 + (14 x 2) =
33
Write an expression to describe this statement:
To solve 16 x 18, I double and halve
32 x 9
OR
8 x 36
Write an equation
To find 26 times 13, I multiply 20 times 13 and add it to 6 times 13
(20 x 13) + (6 x 13) = 338
What is the volume? (need picture)
54 cubic units
Anne is making cards to send to her grandparents. She always puts 4 stickers on each card. If she has 23 stickers, how many cards can she make?
5 cards
Evaluate the expression:
(100 x 67) - (1 x 67) =
6,633
Write an expression to describe this statement:
To solve 31 x 8, I find 3 x 8, multiply by 10, and then add 1 group of 8
((3 x 8) x 10) + (1 x 8)
Fill in the blank:
(2 x 3) x ______ = 30
5
What is the volume? (need picture)
180 cubic units
Mrs. Jordan is buying food for a picnic. A tray of sandwich serves 12 people. How many trays should Mrs. Jordan buy to serve 55 people?
5 trays
Evaluate the expression:
(98 x 47) + (2 x 47) =
4,700
Write an expression to describe this statement:
To find the volume of a box that has a 19 by 22 base and 27 layers, I multiply the area of the base times the height
(19 x 22) x 27
True or False?
4 x 9 = (4 x 10) - 1
True
36 = 36
A box holds 448 cubes. Each layer has 28 cubes. How many layers does the box have?
16 layers
The homecoming game is next week, and the students want to hang banners around the school. The students want to put up 110 banners. The banners come in packs of 40. How many packs will the students need to buy?
3 packs
True or False?
12 x 17 = 6 x 34
True
204 = 204
Write an expression to describe this statement:
To solve 98 x 54, I multiply 100 times 54 and subtract 2 times 54
(100 x 54) - (2 x 54)
Evaluate:
2 x (4 x 2) + 2 x (3 x 5) + 2 x (1 x 6) =
What would this equation find:
Surface Area or Volume?
58
Surface area
Susan counted 26 cubes in one layer of a box. The box has 20 layers. How many cubes can the box hold?
520 cubes
Ms. Seehusen was buying cookies for her class. She wanted each kid to get 2 cookies, along with herself and Trenton. If each cookie container has 6 cookies. How many containers does she need to buy?
6 containers
True or False
99 x 75 = (100 x 75) - 1
False
7, 425 does not equal 7,499