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Learning Objective Today, we will subtract numbers. CFU

Learning Objective Today, we will subtract numbers. CFU What are we going to do today? Activate (or provide) Prior Knowledge. Name_____________________. A. If I eat 2 apples , how many are left?. 3. B. If you eat 1 orange , how many are left?. 2.

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Learning Objective Today, we will subtract numbers. CFU

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  1. Learning Objective Today, we will subtract numbers. CFU What are we going to do today? Activate (or provide) Prior Knowledge Name_____________________ A. If I eat 2 apples, how many are left? 3 B. If you eat 1 orange, how many are left? 2 CFU Students, you already know that when objects are eaten, we take them away. This is called subtracting. Today, we will subtract numbers.

  2. Concept Development • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign To subtract numbers, take away, then count the objects1 left. 1 something you can touch, hold, or see Subtract Numbers - 2 = 3 1 oranges eaten oranges left 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 __________.

  3. Skill Development/Guided Practice • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Subtract numbers. 1 1 2 3 - 1 = 2 1 = 2 - 1 CFU (#2) How did I/you subtract the numbers?

  4. Skill Development/Guided Practice (continued) • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Subtract numbers. 1 = 3 - 2 1 2 3 = 4 - 2 4 CFU (#2) How did I/you subtract the numbers?

  5. Relevance • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. 1. Subtracting numbers will help you find out how many objects or things you have left. I have 3 marbles. If I give 1 marble to my sister, how many marbles will I have left? 2 3 - 1 = marbles left marbles marble 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?

  6. To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Skill Closure Subtract numbers. 1 2 3 1 = 4 - 1 Constructed Response Closure Describe2 how you would subtract the numbers below. (pair-share) 2 tell about = 3 - 1 Summary Closure What did you learn today about subtracting numbers? (pair-share)

  7. Independent Practice • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Subtract numbers. 1 1 = 2 - 1 2 1 2 4 - 2 =

  8. Independent Practice(continued) • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Subtract numbers. 1 2 3 = 5 - 2 3 1 2 3 4 4 = 5 - 1

  9. Periodic Review 1 • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Subtract numbers. 1 = 1 5 - 4 1 = 4 - 3 2 3 = 1 2 5 - 3 4 4 3 1 2 = 6 - 2

  10. Periodic Review 2 • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Subtract numbers. 1 = 1 3 - 2 3 4 5 2 1 = 7 - 2 2 3 1 2 3 = 5 - 2 4 1 = 3 - 2

  11. Periodic Review 3 • To subtract means to take away. • The minus sign (+) tells us to subtract. • The equal sign (=) means the same as. - minus sign =equals sign Subtract numbers. 1 = 1 2 3 4 - 1 5 1 2 3 4 = 6 - 1 2 3 1 2 = 6 - 4 4 1 2 = 5 - 3

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