Put these numbers in order from smallest to largest.

Transcription

1 1 Put these numbers in order from smallest to largest. a b c Read the Warm-Up activity page to your students. SAY: Put these numbers in order from smallest to largest. ANSWER: a ; b ; c COMMENTS & EXTENSIONS: Give children 4 to animals to order in terms of size, 4 to names to order alphabetically, 4 to boxes to order in terms of height, or 4 to spaghetti sticks to order in terms of length. Adding and Subtracting Lesson 1

2 1 More and More! Say: How many chairs are at each table? How many are on each side? Use Color Tiles to act out each picture.. Say: Draw or color the tiles on the table and write the number of chairs at the table in all. continued on the next page Adding and Subtracting Lesson 1

3 1 More and More! _ Adding and Subtracting Lesson 1

4 1 More and More! 1. : Child builds the model and colors the tiles to show.. 8 : Child builds the model and colors the tiles to show 8. Children use Color Tiles. 1. Say: How many boxes are on each train car? Show how many boxes are loaded on the train in all. Color the tiles. Write the number. continued on the next page Adding and Subtracting Lesson 1

5 1 More and More! Child draws 9 tiles in any combination.. 9 Child can draw a different combination of 9 tiles.. Say: The first freight car has boxes loaded. The second freight car has boxes loaded. Use Color Tiles to show how many boxes are loaded all together. Then draw the boxes and write the number. 4. Say: There are nine boxes total. Draw one way to show a sum of 9 boxes on the two freight cars.. Say: There are nine boxes total. Draw another way to show a sum of 9 boxes on the two freight cars. Adding and Subtracting Lesson 1

6 Use counters to solve. birds were on the branch. 4 more landed. How many birds are there in all? Read the Warm-Up activity page to your students. SAY: Use counters to solve. birds were on the branch. 4 more landed. How many birds are there in all? ANSWER: Children may have groups of counters to show addend and the sum. COMMENTS & EXTENSIONS: Equations like this are not to be memorized. They are representations of objects and actions. Children draw a representation of a group of combined with a group of 4 to make a group of 7. Adding and Subtracting Lesson

7 Take It Away 1... Children use Snap Cubes to model the problem. Then they color the beads on the necklace. Next they cross off the beads that are taken away and write the number of beads that are left. 1. Say: There are 8 beads on the necklace. Three are taken away.. Say: There are 10 beads on the necklace. Five are taken away.. Say: There are 7 beads on the necklace. Four are taken away. continued on the next page Adding and Subtracting Lesson

8 Take It Away Children use Snap Cubes to model the problem. Then they draw the beads on the necklace. Next they cross off the beads that are taken away and write the number of beads that are left. 4. Say: There are 8 beads on the necklace. Two are taken away.. Say: There are 7 beads on the necklace. Five are taken away. Adding and Subtracting Lesson

9 1. Take It Away!. 8 are left.. are left. 6 are left. Use Snap Cubes to model the subtraction. Say: Cross out the cubes to show what is taken away. Write the number to show how many are left. 1. There are 10 peaches, are eaten. How many are left?. I had 10 apples. My sister ate 7. How many do I have now?. There were 10 cherries in my lunch. I gave 4 away. Now how many cherries do I have in my lunch? continued on the next page Adding and Subtracting Lesson

10 Take It Away! 4.. are left. Answer key: Drawing of 10 train cars with 9 crossed out. 1 is left. 4. Say: There were 10 bananas in the bowl, are eaten. How many are left?. Say: There are 10 train cars. Nine are unhooked. How many are left? Draw a picture to show this story. Adding and Subtracting Lesson

11 Susan covers counters with her hand. Look at the number of counters left. How many counters are there in all? Write your answer. Read the Warm-Up activity page to your students. SAY: Susan covers counters with her hand. Look at the number of counters left. How many counters are there in all? Write your answer. ANSWER: 9 COMMENTS & EXTENSIONS: Ask children to draw the hidden counters and explain their answer. Then pose a parallel question and see if they can visualize the answer without drawing. SAY: Make up your own problem like Susan s. Exchange the problem with a partner. Adding and Subtracting Lesson

12 1. Frogs on a Log makes. 7 makes makes Have children draw what happens in each story and write the numbers and operation to match. 1. Say: There are three frogs on the log. Four more frogs join them.. Say: There are seven frogs on the log. Two fall into the pool. How many frogs are left?. Say: There are six frogs are on the log and two more join them. How many frogs in all? continued on the next page Adding and Subtracting Lesson

13 Frogs on a Log _ makes. makes Answers will vary. Answers are correct with any combination of frogs on or off the log that show 6 in all and the correct - or + sign 4. Say: There are ten frogs squeezed on the log. Five jump off. How many are left?. Say: There are six frogs. Show one story for how many frogs are on the log and how many frogs are in the water. Adding and Subtracting Lesson

14 1. Frogs on a Log + 7 makes. 8 makes _ _ 0 makes Have children use Frog Counters to model. 1. Say: Write the numbers to match the picture.. Say: Ten frogs are sitting on the log. All 10 jump into the pool. How many are on the log now? continued on the next page Adding and Subtracting Lesson

15 Frogs on a Log makes. Answer key: Check children s drawings. 4. Say: Three frogs are on the log when along come five more. How many frogs are there on the log now?. Say: There is 1 lonely frog sitting on the log. Four more join him. How many are on the log now? Draw circles for frogs to show you worked out the problem. Adding and Subtracting Lesson

16 4 Use counters to solve. a. 7 b. 10 c. 9 Read the Warm-Up activity page to your students. SAY: Use counters to solve. a. 7 b. 10 c. 9 ANSWER: a. Sample: b. Sample: c. Sample: COMMENTS & EXTENSIONS: Math facts are not things to be parroted without meaning. They concern actions on classes of objects. Have children show their thinking and solve Adding and Subtracting Lesson 4

17 4 Adding and Subtracting 1. = + + = = =. 7 = + + = 7 Answers will vary. Unknowns should equal. 7 = 7 = Answers will vary. Unknowns should equal 7. In problems 1 -, children will drop the given number of counters from each problem, color the circles yellow or red to match, and then write number sentences to match their counters. continued on the next page Adding and Subtracting Lesson 4

18 4. Adding and Subtracting = + + = = = 4. 8 = + + = 8 Answers will vary. Unknowns should equal. 8 = 8 = Answers will vary. Unknowns should equal 8. Adding and Subtracting Lesson 4

19 4 1. Adding and Subtracting + = = = _ Children use Two-Color Counters to cover the circles and act out the problem. 1. Have children write a number sentence and tell an addition story to match the model. continued on the next page Adding and Subtracting Lesson 4

20 4 Adding and Subtracting 4. 6 =. 9 4 = 4. Have children write a number sentence and tell a subtraction story to match the model. Adding and Subtracting Lesson 4