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wwwttwww_ `sw 0P,*"T*"*"twP*" :: Problem set 1: Joining and separating, combinations up to 10+10
1-1
6 birds were sitting in a tree. 4 more birds flew up to the tree. How many birds were there altogether in the tree? Join, result unknown 6 + 4 = __
1-2
6 birds were sitting in a tree. Some more fly up to the tree. Then there were 10 birds in the tree. How many more fly up to the tree? Join, change unknown 6 + __ = 10
1-3
Beth has 14 crayons. She gives 4 of them away to Jen. How many crayons does Beth have left? Separate, result unknown 14 - 4 = __
1-4 Create your own: Separate, change unknown. 12 - __ = 7
Problem set 2: Joining and separating, two-digit problems through 30
2-1
Cindys mom baked 15 cookies. Pauls dad baked 12 cookies. They both brought them to school for a party. How many cookies did they have altogether?
2-2
18 children were riding on the bus. At the bus stop, some more children got on the bus. Then there were 25 children altogether on the bus. How many children got on the bus at the bus stop?
2-3
Paul got a box of 28 crayons for his birthday. At the end of the school year, he only had 18 left. How many crayons had been lost or given away?
Problem set 3: No action problems comparing, part-part-whole
3-1
Maria has 15 baseball cards. Chuck has 9 baseball cards. How many more cards does Maria have?
3-2
Ten children were playing soccer. 6 were boys and the rest were girls. How many girls were playing soccer?
Problem set 4: Building place value understanding
4-1
Our class has 5 boxes of doughnuts. There are 10 doughnuts in each box. We also have 3 extra doughnuts. How many doughnuts do we have all together?
4-2
The other second grade class has 4 boxes of doughnuts with 10 doughnuts in each box, and they also have 17 individual doughnuts. How many doughnuts do they have all together?
4-3
Jim picked 54 flowers. He put them into bunches with 10 flowers in each bunch. How many bunches of flowers did Jim make? How many flowers were left over?
4-4
You have 2 boxes of crayons on your desk. Each box holds 10 crayons. You also have 4 more crayons. Your friend gives you 3 more boxes of crayons. How many crayons do you have altogether?
Problem set 5: Multidigit addition and subtraction (showing childrens strategies)
5-1
Misha has 34 dollars. How many dollars does she have to earn to have 47 dollars to buy a dog?
5-2
Elisa has 37 dollars. How many more dollars does she have to earn to have 53 dollars?
5-3
James had 39 stickers. He got some more stickers for his birthday. Then he had 61 stickers. How many stickers did James get for his birthday?
5-4
There were 51 geese in the farmers field. 28 of the geese flew away. How many geese were left in the field?
5-5
The elephant had 407 peanuts. She ate 129 of them. How many peanuts did the elephant have left?
5-6
There were 27 boys and 35 girls on the playground at recess. How many children were on the playground at recess?
Todd: Lets see. 20 and 30, thats 50, and 7 more is 57. Then the 5. 57 and 3 is 60, and the 2 more from the 5 is 62. There were 62. (recall of number facts and derived facts)
Kisha: 20 [pause], 30, 40, 50 [pause], 57, 58, 59, 60, 61, 62. There were 62. (counting on)
5-7
There were 58 geese and 37 ducks in the marsh. How many birds were in the marsh?
Linda: 50 and 30, thats 80. Then 8 and 7, thats, ahh, 9, 10, 11, 12, 13, 14, 15. So its 80 and 15 more. Thats 90, 95. There were 95.
Juan: 5 and 3 is 8, thats 80. Then the 8 and the 7 ... um, 7 and 7 is 14, so 8 and 7 is 15. Okay, so now 15 and 80 is 95.
5-8
Paul had 28 strawberries in his basket. He picked 35 more strawberries. How many strawberries did he have then?
Mary: 30 and 35 would be 65. But its 28, so its 2 less. Its 63.
5-9
Gary had 73 dollars. He spent 55 dollars on a pet snake. How many dollars did Gary have left?
Problem set 6: Multiplication (Grouping Problems)
6-1
Megan has 5 bags of cookies. There are 3 cookies in each bag. How many cookies does Megan have all together?
6-2
Jenise is shopping for a school party. She buys 15 bags of cookies. Each bag has 24 cookies in it. How many cookies will she have altogether?)
Problem set 7: Division
7-1
Emily is getting ready for a bake sale. She has 32 cookies. She puts 4 cookies in each bag. How many bags can she fill? (Measurement Division how many groups?)
7-2
There are 32 cookies on a plate. 8 friends want to share the cookies equally. How many cookies will each person get? (Partitive Division how many in a group?)
7-3
Ryan is getting ready for a bake sale. He has 27 cookies. He puts the cookies into 9 bags with the same number of cookies in each bag. How many cookies are in each bag? (Partitive Division)
7-4
A school is taking a field trip to the zoo. They will ride in buses. There are 320 students and 20 adults who are going on the field trip. Each bus can hold 50 people. How many buses will they need?
CGI Problem sets
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