MODULE 4LESSON 20

Use math drawings to represent additions with up to two compositions and relate drawings to a written method

OBJECTIVES

FLUENCY: ADDITION FACT FLASH CARDS

10+2

4+3

4+2

2+2

2+1

3+_=5

2+1

6+2

2+5

7+_=9

8+22+9

3+_=11

7+_=10

6+3

3+5

3+_=6

13=3+_

3+96+3

FLUENCY: ADDITION FACT FLASH CARDS

2+3

7+4

4+1

7+5

4+8

4+_=8

5+5

10+5

2+4

4+_=13

10+41+3

6+_=11

6+_=10

5+8

4+5

4+_=7

5+_=8

2+55+1

Put your name and number at the top of the page Sprint A

On your mark, get set, THINKLets check your workWrite the number you got correct up topSprint BOn your mark, get set, THINKLets check your workWrite the number you got correct up topWhat was your improvement?

SPRINT: ADDITION CROSSING A TEN

Kendra and Jojo are counting their marbles. Kendra has 38 and Jojo has 62. Kendra says they have 100 marbles altogether, but Jojo says they have 90. Use words, numbers, or models to prove who is correct.

RDWShare your work with you neighbor.Let’s check

APPLICATION PROBLEM

Write this problem down the vertical way on you paper.

76+27Now let’s model it by drawing a place value chart.

Draw you chart like mine. 100’s 10’s

1’sLabel the place values.Now draw both addends using the chipModel.Don’t forget to whisper count as you draw.When you are done use place value language to tell

you partner how your model matches the written addition.

CONCEPT DEVELOPMENT

Look at the ones place fi rst. What is 6 ones + 6 ones?

13 ones. The say ten way? Ten 3 Tell you neighbor what to do on

your model and on you written model.

Let’s show that on our model and written addition.

Check your work with a neighbor On your written addition, you have

written a 1 on the line. On you chart point to what the 1 stands for.

A new ten

CONCEPT DEVELOPMENT

What do we do next?Yes! 6 ones+7ones is 13 ones, 1 ten and 3 ones. So we write 1 new ten on the line below the tens

place, and we write the 3 ones below the line in the ones place. What do we do next?

Add the tensWhat is 7 tens +2 tens+ 1 ten10 tens or 100Show the steps on your written additionLet’s read the entire problem76+27=103

CONCEPT DEVELOPMENT

Here is a picture showing our work.Notice the steps that we had

written with the models we drew. Practice modeling and writing these

following problems. On your whiteboards or journals.

42+9642+6786+4899+99

CONCEPT DEVELOPMENT

Now let’s practice the skills.

PROBLEM SET