Comparison Captains
There are 60 students in the cafeteria. This is 5 times the number of students on the playground. Write a multiplication equation for this situation.
5 x a = 60 or 5 x 12 = 60
True or False: One meter is 1,000 kilometers.
False. One kilometer is 1,000 meters.
A rectangle has a perimeter of 60 cm. If one side is 15 cm, is it a square?
Yes.
If the perimeter is 60 and one side is 15, the opposite side is 15 (total 30). The remaining 30 must be split between the other two sides (15 each). Since all sides are 15 cm, it is a square.
How many ounces are in 2 pounds?
32 ounces.. (Reasoning: 2 x 16 = 32)
A bracelet has 15 beads. A necklace has 3 times as many beads. Choose the correct equation to find the necklace beads
a) 15 + 3
b) 15 - 3
c) 3 x 15
c) 3 x 15
True or False: One kilometer is 1,000 meters.
True.
If a rectangle has a perimeter of 30 cm, can it have a side that measures 16 cm?
No.
If one side is 16 cm, the opposite side must also be 16 cm, which totals 32 cm. This already exceeds the 30 cm perimeter.
A bag of sugar weighs 5 pounds. How many ounces is that?
80 ounces.. (Reasoning: 5 x 16 = 80)
If there are 48 students in the cafeteria and that is 4 times as many as the playground, how many students are on the playground? Explain your reasoning.
A swimming pool is 50 meters long. How many centimeters long is the pool?
5,000 CM
True or False: If a rectangle's perimeter is 20 cm and one side is 1 cm, another side must be 19 cm.
False.
If one side is 1 cm, the two widths total 2 cm. The remaining 18 cm must be split into two 9 cm lengths.
Explain why 1/4 of a kilogram is 250 grams.
Because 1 kilogram is 1,000 grams, and 1,000 divided into four equal parts is 250.
Garden A has a perimeter of 20 yards. Garden B has a perimeter of 10 feet. How many times larger is Garden A's perimeter than Garden B's?
6 times larger.
A student says a 5,000-meter race is only 50 centimeters long. Is this reasonable?
No, it is not reasonable because 50 centimeters is only about half a meter (or two rulers), while 5,000 meters is a long-distance race.
A rectangle has a perimeter of 40 cm. If one side measures 5 1/4 cm, what does the adjacent side measure?
14 3/4 cm. Half of the perimeter is 20. 20 - 5 1/4 = 14 3/4.
One dog eats 2 1/2 kg of food a week. Another dog eats 300 grams a day. Which dog eats more in a full week?
The first dog (2 1/2 kg) because 2 1/2 kg is 2,500 grams. The second dog eats 300 x 7= 2,100 grams per week.