When we arrived at Yancheng Zoo, we first sat on the sightseeing bus and watched the lovely animals. Aunt looked at the animal pen and had a brainwave. She came up with a math problem: "Hey! I'll test a math problem for the little guys! Whoever does it right will double his lucky money! " We were ecstatic and jumped three feet. Aunt smiled and said, "There are two animals here, sika deer and red-crowned crane. There are 17 animals in this zoo enclosure. Count to 56 feet. Think about it. How many sika deer are there in the zoo enclosure? How many red-crowned cranes are there? "
After listening to this math problem, cousin scratched her head and rolled her eyes, and came up with a good idea: solving problems by list. She took a blank sheet of paper from her pocket and made a list on it. I thought to myself silently: Let's assume that 17 animals are sika deer, and each sika deer has four feet, *** 17×4=68 feet. 68-56= 12 (only), more than the actual 12, while sika deer has two more feet than each red-crowned crane. One more * * * 12 divided by two more, 12÷2=6 (only).
Is the number of red-crowned cranes
17-6= 1 1 (only)
therefore
Sika deer is 1 1.
I told menstruation the answer I came up with, but my cousin made a list on paper! My aunt said to me, "You got it right! This is actually a math problem in which a chicken and a rabbit are in the same cage. Don't worry, I won't break my word on the lucky money! "
Haha's laughter ... Happy laughter echoed in the beautiful Yancheng Zoo for a long time.
Red-crowned crane in the enclosure of aunt sika deer zoo