3 Circle Venn Diagrams
and more Division of Decimals
7th grade
name _______________________ date ____________
There are many ways to arrange 3 sorting circles. Below you will find some of these arrangements. Beside each group of circle is a list. Think about the items on the list and write each in the circle or rectangle where you think it belongs. 1.
math papers things to do homework playing soccer
2.
living things birds frogs plants
3.
people surgeons nurses doctors medical occupations
4.
pilots people who travel people who fly in planes people
5.
rocks in my town rocks in my yard gray rocks rocks
6.
food sandwiches jelly sandwiches peanut butter sandwiches
For each of the following problems draw a Venn diagram, fill in the given information, and answer the questions. 7. At the zoo we observed 94 monkeys. Thirty-three were swinging by their tails. Thirty-seven were eating fruit. Thirteen were swinging by their tails while eating fruit. Six were grooming and swinging. Twenty-four were grooming. Three were grooming, swinging by their tails, and eating fruit. Nine were grooming while eating fruit. How many were swinging and not eating?
8. HaMorah Penelope’s sixth period reading class entered her room after lunch and settled down to work in their usual lethargic manner: some reading and some yawning. HaMorah Penelope was glad to see 20 students reading, but she was perplexed to see 17 students yawning. She was also able to observe 5 students reading and yawning. Of the 18 girls in the class of 45 students, 8 were reading and 6 were yawning. Four girls were very busy, both reading and yawning. The perplexed HaMorah Penelope’s real problem, however, appeared to be as follows: How many boys were neither reading nor yawning? HaMorah Penelope, not to be terrorized by such behavior, decided to send these louts to the dean’s office. How many passes did she have to write?
Divide. Round each quotient to the nearest hundredth. 9. 0.04 0.00086 10. 0.029 0.8732
Divide. Round each quotient to the greatest place-value position. 11. 0.9 34 ,521.9 12. 3.4 86 ,487 .36 13. 0.09 42 ,854 .2
14. Jimmy found the product of 12.8 and 2.2 to be 281.60. You recognize immediately that Jimmy has made a mistake. Explain to him how you can tell his answer is incorrect without doing the problem. Be sure to explain it in complete sentences so Jimmy will understand what you are saying. Don't forget to tell him what the real answer should be (by the way, Jimmy has all the digits correct in his answer!)