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DataWORKS Educational Research (800) 495-1550 ©2012 All rights reserved. Comments? 1 st Grade Algebra &

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Presentation on theme: "DataWORKS Educational Research (800) 495-1550 ©2012 All rights reserved. Comments? 1 st Grade Algebra &"— Presentation transcript:

1 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. CFU Teacher completes A; students complete B. Students, you already know how to solve number sentences. Sometimes we have to read word problems to find the subtraction number sentences that we need to solve. Today, we will write subtraction number sentences. Learning Objective Name________________________ CFU What are we going to do today? Activate (or provide) Prior Knowledge Today, we will write subtraction number sentences. Circle the minus sign. Circle the equal sign. Solve the subtraction number sentences. A 7 – 3 = B 3 – 2 =

2 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Concept Development CFU On your whiteboard, write a minus sign. On your whiteboard, write an equal sign. Which of the number sentences can be written from the following word problem? How do you know? A B Subtraction means to take away. Subtraction Number Sentence: Harry had five pieces of candy. He gives one to his little brother. Harry has four pieces of candy left. Jose has five rubber balls and gives two balls to his friend. Jose has three rubber balls left. 5 – 2 = 3 To write a subtraction number sentence, look for subtraction key words. 5 + 2 = 7 Subtraction Key Words left gives 5 - 1 = 4 number minus signequal sign In your own words, what does subtraction mean? Subtraction means _____________________.

3 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Skill Development/Guided Practice Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. 1 find Write subtraction number sentences. 1. Jesse has three marbles. He gives two to his sister. Jesse has one marble left. 2. Alisha has four marbles. She gives one to her brother. Alisha has three marbles left. Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words. Subtraction Key Words left gives CFU (#1a) How did I/you identify subtraction key words? (#1b) How did I/you identify number words? (#2) How did I/you write a subtraction number sentence?

4 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Skill Development/Guided Practice (continued) Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. Write subtraction number sentences. 3. Juana has five pieces of candy. If she gives her brother three pieces, Juana will have two pieces left. 4. Alexis has six pencils. If she gives Jane two pencils, Alexis will have four pencils left. CFU (#1a) How did I/you identify subtraction key words? (#1b) How did I/you identify number words? (#2) How did I/you write a subtraction number sentence? Subtraction Key Words left gives Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words.

5 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Importance CFU Does anyone else have another reason why it is important to write a subtraction number sentence? (pair- share) Why is it important to write a subtraction number sentence? You may give me my reason or one of your own. Which reason is more important to you? Why? 1.Writing subtraction number sentences will help you solve real world problems. James has seven pieces of candy. He gives two to his older sister. James has five pieces of candy left. 7 – 2 = 5 Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words.

6 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Concept Closure 5 − 2 = 3 What do the symbols mean? − __________________________ = __________________________ Skill Closure Write subtraction number sentences. Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. 1. Jamie has six shirts and gives two shirts away. Jamie has four shirts left. Subtraction Key Words left gives Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words. Summary Closure What did you learn today about writing subtraction number sentences? (pair-share)

7 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Independent Practice Name ________________________ 1. Alberto has seven pens and gives away five pens. Alberto has two pens left. 2. Ralph has four binders. If he gives his friend George three of them, Ralph has one binder left. Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. Write subtraction number sentences. Subtraction Key Words left gives Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words.

8 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Independent practice (continued) 3. Sarah has seven coins. If she spends two of them on candy, Sarah has five coins left. 4. Juan has seven erasers. If he gives Jose six, Juan has one eraser left. Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. Write subtraction number sentences. Subtraction Key Words left gives Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words.

9 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Periodic Review 1 Name _______________________ 1. Harry has six toy cars. If he gives four of them to his brothers, Harry has two cars left. 2. Bob found seven blocks in the front room. He gave his sister six. Bob has one block left. Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. Write subtraction number sentences. Subtraction Key Words left gives Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words.

10 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Periodic Review 2 Name ________________________ 1. Jeff has eight marbles. He gives Jane six marbles. Jeff has two marbles left. 2. Mary has nine stickers and gives Melissa four. Mary has five stickers left. Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. Write subtraction number sentences. Subtraction Key Words left gives Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words.

11 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Periodic Review 3 Name ________________________ 1. Sheila has eight bracelets. She gives four to Alicia. Sheila has four bracelets left. 2. Frank has seven toy cars. He gives Harry five toy cars. Frank has two toy cars left. Step #1: Read the word problem carefully. a. Identify subtraction key words. (underline) b. Identify number words. (circle) Step #2: Write a subtraction number sentence. Hint: Remember that the larger number is first. Step #3: Read the subtraction number sentence aloud. Write subtraction number sentences. Subtraction Key Words left gives Subtraction means to take away. To write a subtraction number sentence, look for subtraction key words.

12 DataWORKS Educational Research (800) 495-1550 www.dataworks-ed.com ©2012 All rights reserved. Comments? feedback@dataworks-ed.com 1 st Grade Algebra & Functions 1.1 Write and solve number sentences from problem situations that express relationships involving addition and subtraction. Lesson to be used by EDI-trained teachers only. Blank Page


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