DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Learning Objective Today, we will subtract numbers. CFU What are we going to do today? Activate (or provide) Prior Knowledge CFU Students, you already know that when objects are eaten, we take them away. This is called subtracting. Today, we will subtract numbers. A. If I eat 2 apples, how many are left? B. If you eat 1 orange, how many are left? Name_____________________ 3 2

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Concept Development CFU On your whiteboards, draw the minus sign. On your whiteboards, draw the equals sign. In your own words, how do you subtract numbers? To subtract numbers __________. To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as.  minus sign  equals sign = oranges eaten oranges left To subtract numbers, take away, then count the objects 1 left. Subtract Numbers 1 something you can touch, hold, or see

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Skill Development/Guided Practice Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as. Subtract numbers.  minus sign  equals sign CFU (#2) How did I/you subtract the numbers? 31- = 21- =

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Skill Development/Guided Practice (continued) Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as. Subtract numbers.  minus sign  equals sign CFU (#2) How did I/you subtract the numbers? 32- = 42- =

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Relevance CFU Does anyone else have another reason why it is relevant to subtract numbers? (pair-share) Why is it relevant to subtract numbers? You may give me one of my reasons or one of your own. Which reason is more relevant to you? Why? I have 3 marbles. If I give 1 marble to my sister, how many marbles will I have left? 1. Subtracting numbers will help you find out how many objects or things you have left. To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as = marblesmarble marbles left

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. 41- = Constructed Response Closure Summary Closure What did you learn today about subtracting numbers? (pair-share) Describe 2 how you would subtract the numbers below. (pair-share) 31- = 2 tell about Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as. Subtract numbers.  minus sign  equals sign Skill Closure

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Independent Practice Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as. Subtract numbers.  minus sign  equals sign 42- = 21- =

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Independent Practice (continued) Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as. Subtract numbers.  minus sign  equals sign 52- = 51- =

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Periodic Review = 43- = 53- = 62- = Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” Subtract numbers.  minus sign  equals sign To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as.

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Periodic Review = 72- = 52- = 32- = Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” Subtract numbers.  minus sign  equals sign To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as.

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Periodic Review = 61- = 64- = 53- = Step #1: Read the problem. Step #2: Subtract the numbers. Hint: Take away, then count the objects left. Step #3: Write the answer. Step #4: Say the problem and the answer. “_____ minus_____ equals ______” Subtract numbers.  minus sign  equals sign To subtract means to take away. The minus sign (+) tells us to subtract. The equal sign (=) means the same as.

DataWORKS Educational Research (800) ©2012 All rights reserved. Comments? Kindergarten Mathematics Number Sense 2.1 Use concrete objects to determine the answers to addition and subtraction problems (for two numbers that are each less than 10). Lesson to be used by EDI-trained teachers only. Blank Page