John has 8 baseball cards and 7 football cards. How many sports cards does he have in all? I like to guide the discussion about how to solve the problem using different strategies.
Students will be able to represent a given missing addend word problem using a number sentence. Students will be able to identify the initial, change, and result of a word problem. Introduction 10 minutes Tell the students that today they will be reviewing fact families, or related numbers, and they will use that knowledge to help them represent missing addend word problems.
Remind your students that an addend is a number in a problem that is being added. Show the example of a fact family triangle to the students, and have them explain the relationship between the 3 numbers. Tell the students that they will make their own fact family triangles and play a game with them.
Pass out the triangles, and have the students each write out a fact family.
Then, have them walk around the room to find a partner to answer the question. Direct each student to cover up one of the 3 numbers and show it to his partner.
Next, have your students find new partners and do it again. After they have asked several peers, have them sit down. Instruct your students to keep the triangles in their desks to play later. Read it aloud to the class and explain your thinking to them, reasoning how the sentences tell you the starting and ending amounts.
Use the key terms initial, or beginning, and change, or difference, when discussing the missing addends to help the students visualize the story. This time, have the class read out the question, and have students go through sentence by sentence to locate the addends for the initial and change.
Then, change the word problem a little to switch the mystery addend, and then have the students explain how they would answer that one.
Independent working time 20 minutes Explain to the students that they will independently do what they just practiced with you on the board. Handout the Missing Addend Word Problem worksheets, and have the students cut out the number sentences and match them to the word problems.
When students finish this, instruct them to pair up and discuss why they chose the number sentence they did for each word problem. As the students are doing this, walk around and conference with students and document their thinking. When you notice that the students have done their pair-sharing, choose some students to share what they did and why.
For advanced students, ask them to make their own missing addend word problems, and have their peers write number sentences to represent them.
Give students manipulatives, or instruct them to draw a picture of the word problem to help them visualize it.
Assessment Make sure your students are correctly representing the missing addend word problems with number sentences.
Walk around as your students are completing the assignment, checking their initial and change amounts. Review and closing 5 minutes After the students share their answers as a class, write down a couple of number sentences on a piece of chart paper to show missing addends.Use Doubles Facts Use doubles facts to help you find sums.
If you know 6 + 6, you can find 6 + 7. Write a number sentence.
11 – 5 = 6 ——— There are 6 Write a number sentence. Use a n for the missing number. = n 5.
Grade 2 addition worksheets. Extensive practice is required to develop mastery in basic math skills; these worksheets span a wide range of grade 2 addition topics from adding single digit numbers to addition in columns with regrouping. As kids put together our skill-building sun puzzles, they boost addition fluency with missing addends—in a concrete, visual way! Each self-correcting puzzle features a number from 1 to 17, plus 5 equation pieces that each show a number sentence with a missing addend. First Grade Math: Addition. Write the number sentence. CENTER NUMBER 5: MAKE 10 AND ADD. Look at the first number. Decide what number must be added to make 10 and write it into the first bubble. Then complete the number bond. ADD THE MISSING ADDEND. Write the number that must be added to the top number to make Add the numbers.
Missing Addend - The missing number in a number sentence that makes the number sentence true. Near Doubles - Addition facts in which one addend is exactly 1 more or 1 less than the other addend.
Related Facts - Basic facts using the same number. The addition property says that if you add the same number (or subtract the same number)from both sides of the eqaution you do not change the equation.
•se the number bond to write a U missing addend sentence: 4 1? 5 6. • Find the missing addend: 4 1 2 5 6. So 6 2 4 5 2. Invite your child to share what he or she knows about using missing addend sentences to solve addition problems by doing the following activity together.
1 Operations and Algebraic Thinking. 6OOpepratiaOtonse idepra. As children become fluent in computation, they begin to apply their How do you use subtraction to find a missing addend, or adding Write the missing number. 3. 5 + _____ = Find the missing number in each addition.
Missing Addends- Solve each number sentence by adding the missing addend. The Summer Review NO PREP Packets are packed with hands-on activities to keep your children learning all summer long!