Area
The area of a path is 8,024 square feet and one side is 8 feet. Find the other side.
1003 feet
The perimeter of a rectangle is 846 cm and one side is 134 cm. What is the other side?
289
100 — Marco used doubling & halving to solve 25 × 56. Show at least one doubling and halving equation he created, then solve for the answer
1) 50 x 28
2) 100 x 14
Answer: 1400
A parent brings 74 balloons and divides them evenly among 8 tables. How many balloons does each table get?
9 with 2 left over (can't divide a balloon)
Students measured the lengths of small shells in inches:
3 2&½ 3 2&¾ 3&¼ 2&½ 3 3&¼ 2&¾
Create a line plot SEPARATED INTO FOURTHS to show the data.
Then find the mode of the shell lengths?
Response: What is 3 inches?
check line plot for accuracy
Mode = 3
A rectangle has area 540 sq ft. If one side is 12 ft, what is the other side?
45 feet
A rectangle has perimeter 220 m. If one side is 60 m, what is the other side?
50 m
True or False: 32 × 24 = 64 × 12.
(Answer True / False and explain briefly.)
TRUE:
Doubling one factor and halving the other leaves the product unchanged.
Eight friends pay a group rate of $264.24. How much does each friend pay?
$33.03 each
Students weighed small rocks in ounces:
1&¼ 1&½ 1&¾ 1&¼ 1&½ 1&¼ 2
Make a line plot SEPARATED BY HALVES of the rock weights.
What is the median weight?
Check Line Plot for Accuracy
Median: 1 & 1/2
A rectangular garden has area 2,376 sq ft. If the length is 24 ft, what is the width?
99 feet
The perimeter of a rectangular field is 1,512 ft. One side measures 369 ft. What is the opposite side’s length if the other side is unknown?
387 feet
Fill-in-the-blank: 57 × 28 = ____ × 14.
Then find the answer (hint: it should be equal because you are making an equivalent expression)
114 fills in the blank
114 x 14 or 57 x 28 = 1596
If you bought some pinatas for $109 and split the cost with 4 people, how much will each person contribute?
$27.25
Students timed toy cars rolling down a ramp (in seconds):
4&½ 4&¾ 4&¼ 5 4&¾ 5 4&¼ 4&½ 4&¾.
Create a line plot SEPARATED BY HALVES.
Then find the mode AND range of the times.
Check Line Plot for Accuracy
Mode = 4 ¾ seconds
Range = ¾ second (5 - 4 & 1/4)
A playground area is 9,600 sq ft. One side is 40 ft. What is the other side?
240 feet
A rectangle has perimeter 2,400 in. If one side is 725 in, what is the other side?
475 inches
Evaluate: 726 ÷ 6 using an Array (also called an Area Model). What is the quotient?
Check the group's array / area model
Answer: 121
You purchased some candy necklaces in bulk for $112.50. You and 5 friends split the cost evenly. How much will each person pay?
$18.75
Students recorded the heights of seedlings (in inches):
1&½ 1&¾ 1&¼ 1&½ 1&½ 2 1&¼ 1&¾ 1&½ 1&¼.
Make a line plot of the seedling heights IN FOURTHS.
What is the median height, and how does it compare to the mode?
Check Line Plot for Accuracy
Median = 1 ½ inches
Mode = 1 ½ inches
they are the same)
The area of a rectangle is 15,625 square feet and one side is 125 feet. What is the other side?
125 feet
A rectangular parking lot has perimeter 5,000 ft and one side measures 1,300 ft. What is the length of the other side?
1200 feet
The scouts collected 13 bags with 16 cans each and then 12 bags with 15 cans each. Their goal is 550 cans. If they don't have enough cans, how many more do they need?
ANSWER: 162 more cans
550 - (13×16) + (12 x 15)
550 - (208 - 180)
550 − 388 = 162 more cans needed
Granny is paying you $5.44 for picking up sticks in the woods, but you have to split it evenly among yourself and 3 cousins. How much does each kid get?
$1.36
Students measured how far paper airplanes flew (in meters):
3&¼ 3&½ 3&¾ 4 4&¼ 3&¼ 3&¾ 3&½ 4&¼ 3&¾.
Draw a line plot of the data IN FOURTHS.
Then find the median, mode, and range.
Check Line Plot for Accuracy
Median = 3&¾ m
Mode = 3&¾ m
Range = 1 m (4 & 1/4 - 4 & 3/4)