100

I can add numbers to 100.

I can subtract numbers to 100.

I can plan for a Fiesta using Math!

I can identify the difference between: 

Contar hacia adelante (Counting up)

Ecuasión (Equation) 

Formar grupos de diez (Form groups of 10)

Decenas y unidades (Tens and ones)

Walk through a word problem with the learners as they plan for a Fiesta! 

What do you need for a Fiesta?

Comida/ Food

Juegos / Games 

Decoraciones / Decorations

Regalos/ Gifts

Vocabulario

• más / menos

• mayor que / menor que

• cuántas quedan, cuántos quedan, cuanto queda,

• la diferencia,

• quitar, sobrar, perder, restar,sumar

• ¿Cuál es tu fruta favorita?  o ¿Cuál te gusta más?  

• Mi fruta favorita es _____________.

• A mí me gusta (el/la) ______________   más.

Essential Questions

• How might I use tools to model this problem?

• How might I use the information given to solve this problem?

• Does my solution make sense?  Why?

• How can I move numbers around to make the problem easier to solve?

• How do strategies (make a 10, doubles) help me solve problems more efficiently?

• How do I find the missing part of an equation?

• How do strategies and properties of operations help me solve problems?

• How does understanding addition help me with subtraction?

• How do I know if an equation is true or false?

Seeds of Rigor for Instruction and Deeper Learning

OA.1

• Gail and Bill found 12 seashells on the beach. Some of them were shaped like cones. The rest of them were shaped like half circles. How many could have been shaped like cones? How many could have been shaped like half circles?

• Maria has eight more crayons than Brian. Maria has 10 crayons. How many crayons does Brian have? Use this answer to solve the next question.

• Ana has 4 crayons. If she puts her crayons with Brian and Maria’s crayons, will they have enough crayons to fill a box that holds 16 crayons? How do you know?

• Jim had sixteen toy cars. He went to the toy store with his father. His father bought him some more cars. When Jim got home, he counted his cars and then he had 20. How many cars did his father buy for him?

• On Monday, Cara made 5 cupcakes. On Tuesday, Cara made some more. She had 11 cupcakes altogether. How many cupcakes did Cara make on Tuesday?

OA.3

• How would you describe the commutative property to someone from another planet?

• Show me 2 different examples that proves the commutative property.

• Why does the total stay the same, even though you are adding in a different order? (example 6+5=11 and 5+6=11) Use drawings and/or models to help explain.

• Would you get the same sum if you had two blue buttons and three red buttons as you would if you had three blue buttons and two red buttons? Can you write the addition sentences that show that?

• Laura had 5 fish. Her mother gave her 1 more. Laura’s brother Frank had 1 fish. Their mother gave Frank 5 more. Laura cried, “That’s not fair! He has more fish than I do!” Frank doesn’t agree. Who is correct? How you know?

• I own a pet store. There are 9 dogs, 1 cat and 3 fish in the store. How many pets are in the store? What number sentence could you write to match this story problem? Where is 10 in this number sentence? What new number sentence could we write to match what we did?

• Laura solved the following problem: 7 + 2 + 3 = 12 How do you decide which numbers to add together first? What “friendly” number combinations do you see? Will we get the same number if we solve it different ways?

OA.4

• Sarah picked three apples from the tree. Sarah needs 15 apples in all. How many more apples does Sarah need to pick?

• There were 12 children on the swim team. Four of them were boys and some were girls. How many girls were on the swim team?

• The zoo keeper gave some bananas to the monkeys for lunch. The monkeys ate 7 bananas and the zoo keeper counted 8 left. How many bananas did the zoo keeper start with?

• Marty has 9 books in his library. He wants to have 18. How many more books does Marty need to get?

• Ms. Smith has 17 stamps left in her book of 20. How many stickers did she use?

OA.6

• How is 9+2 related to 29+2, 49+2, and 79+2?

• How does the make-ten fact, 4+6 help you find the sum of 34+6 or 54+6?

• Does the doubles strategy work with numbers greater than 10?

• When we subtract 2 we can think of counting back. Does this work with two-digit numbers? How are 61-2, 31-2, and 11-2 related?

• How could you use doubles to help you find the sum of 7 + 6?

• Julie picked out three different dominoes out of a pile of dominoes. If she added the dots on each domino, the sum of each domino was 10. What could the three different addition sentences be for the three dominoes she picked?

OA.7

• Sally said 3+4=5+3. Sam says she is wrong. Who is correct? Use numbers, pictures and/or words to show your thinking.

• Consider this problem: 3+7=10. What does the equal sign mean?

• Trisha said 11=13 - 4 is not true. How could Trisha fix this problem to make it true?

OA.8

• I am thinking of two numbers on the number line that have a difference of 5. What could the two numbers be? How do you know?

• There are 4 more twix candy bars than snickers.  How many twix and snickers might you have?

• If the sum of two numbers is 13, what could the two addends be? How do you know?

• Use the digits 3, 4, 5, 6 & 7 to make the following equations true. Each digit may be used only once. (_ + 6 = 12, 5 - _ = 2, 4 = _ - 3, 6 = 2 + _13 - ___ = 8)

A ribbon is 14 inches long. Jan used some ribbon to wrap a gift. How much ribbon could be left?. How many inches of ribbon did Jan use? Write a number sentence that shows how you solved the problem.