Yesterday we solved some addition story problems. Today we are going to solve some subtraction story problems. We will use mental math strategies to solve the problems. Who can help us review the mental math strategies we have learned?
Yesterday we solved some addition story problems. Today we are going to solve some subtraction story problems. We will use mental math strategies to solve the problems. Who can help us review the mental math strategies we have learned?
Math4u grade 2 first term
لشراء كتاب ماث فور يو جريد 2 أضغط هنا
ولمشاهدة شرح دروس ماث جريد 2 الترم الاول المنهج الجديد بأسلوب سهل وبسيط أضغط على الرابط التالى
ولمشاهدة شرح دروس ماث جريد 2 الترم الاول المنهج الجديد بأسلوب سهل وبسيط
أضغط على الرابط التالى
Mathematics Teacher`s Guide primary 2
Math primary 2 first term lesson 16
Learn (40 minutes)
Learn (40 minutes)
Directions
Directions
Note to the Teacher: For the Learn section today, students will Model the strategies they have been learning to solve subtraction story problems.
TEACHER DO: Use Calling Sticks to select a student to read aloud the mental math strategies on the class poster.
TEACHER SAY: Listen carefully to the first problem. Layla collected 17 stones. She gave 10 to her sister. How many stones does Layla have now?
TEACHER DO: Use Calling Sticks to select students to answer the questions below. Record their answers on the board.
• How many stones did Layla collect? (17)
• How many stones did she give to her sister? (10)
STUDENTS DO: Selected students answer the questions aloud.
TEACHER SAY: Think about the mental math strategies we have been practicing. Raise your hand if you can solve this problem in your mind.
STUDENTS DO: Raise their hands if they can solve the problem in their minds.
TEACHER DO: Select a student to solve the problem and explain the mental math strategy they used. If the student’s answer is incorrect, allow them to ask another student for help.
TEACHER SAY: Raise your hand if you used a different mental math strategy to solve the problem.
STUDENTS DO: Raise their hands if they used a different mental math strategy to solve the problem.
TEACHER DO: Select another student to solve the problem and explain the different mental math strategy they used. If the student’s answer is incorrect, allow them to ask another student for help.
TEACHER SAY: Our friends used two different strategies, but got the same answer: 17 minus 10 equals 7. Layla has 7 stones left.
2.TEACHER SAY: We are going to solve a few more of these in your student book. Please take out your book and turn to the page Lesson 16: Apply. On this page, you will see some story problems. We will read through each story problem together. You can use any of the mental math strategies on our poster to help you find the sum. Try not to draw pictures or use tally marks. After you solve the problem using mental math, write each number sentence in your student book.
TEACHER DO: For each story problem, read the problem aloud and then allow time for students to work independently to solve the problems. Walk around while students are working to help those who may need it. Then have students share their work and strategies with their Shoulder Partners and ask volunteers to share their work with the class. Be sure students explain their thinking and their use of the mental math strategy they selected. Confirm correct answers and encourage students to fix their work if necessary.
STUDENTS DO: Listen to each story problem read by the teacher. Work independently to solve each problem using any of the mental math strategies. Record the number sentence in the student book. Share work and strategies with Shoulder Partner. Selected students share their work with the class. Correct the work in their student books if necessary.
TEACHER SAY: Great work today, class. You all are getting very good at using mental math strategies to find the difference.
