Doubling and Halving
Fill in the blanks on this doubling and halving problem.
5x12
__x24
10
Fill in the ratio table for 5
Solve 78/3
26
What are the formulas for area AND perimeter?
A= length x width
Perimeter= Length + length + width + width
Fill in the blanks on this doubling and halving problem.
24x20
48x__
10
see board
Sarah has 48 apples. She wants to share them equally among 4 baskets. How many apples will go in each basket?
12 apples per basket
Find the perimeter AND area of a rectangle with these dimension.
**MUST HAVE CORRECT UNITS FOR POINTS
length= 24 inches
width= 3 inches
Area= 72 sq inches
Perimeter= 54 inches
**MUST HAVE CORRECT UNITS FOR POINTS
Fill in the blanks on this doubling and halving problem.
20x40
___x80=__
10x80=800
Create a ratio table for 18 AND solve 18x20
see board for ratio table
360
Liam has 53 toy cars. He wants to put the same number of cars on each of 6 shelves. How many cars can he put on each shelf, and how many cars will be left over?
*HINT- there is a remainder
8 cars per shelf with a remainder of 5 cars
Find the LENGTH of a rectangle.
The width= 5 miles
Area= 120 sq miles
Hint- area=lengthxwidth
**MUST HAVE CORRECT UNIT FOR POINTS
Length= 24 miles
Fill in the blanks on this doubling and halving problem.
26x32
__x64
13
Create a ratio table for 23 AND solve 23x11
see boards for ratio tables
253
A library has 144 books to be placed equally on 3 shelves. How many books will go on each shelf?
48 books
Find the LENGTH of a rectangle.
The width= 12 miles
Area= 240 sq miles
Hint- area=lengthxwidth
**MUST HAVE CORRECT UNIT FOR POINTS
Length= 20 miles
We want to use a doubling and halving strategy to help solve this equation.
25x56=?
What is the product of 25x56? Use DOUBLING and HALVING to solve.
25x56=
50x28=
100x14=1,400
Create a ratio table for 38 AND solve 38x29
see boards for ratio tables
1,102
A factory packed 257 toys into boxes. Each box holds 4 toys.
a) How many full boxes can they pack?
b) How many toys will be left over?
a) 64 full boxes
b) 1 toy leftover
Find the LENGTH of a rectangle.
The width= 22 meters
Perimeter= 156 meters
Hint- perimeter= length + length+ width+ width
**MUST HAVE CORRECT UNIT FOR POINTS