PART/ PART = WHOLE EQUATIONS

Hello! 

Today's Learnzillion lesson will help you use addition to solve subtraction problems.
1. Watch the PART PART WHOLE video here.

As you watch the lesson, write down your answers on a whiteboard.

HOMEWORK:
Write a comment. 
Explain how to use a part/part whole diagram to solve two of these equations: 

59 + ? = 100             63 + ? = 91              37 + ? = 55            42 + ? = 70


54 + ? = 72               26 + ? = 75              28 + ? = 53            35 + ? = 52

2. Watch PART PART WHOLE Practice PART II Here

As you watch the lesson, write down your answers on a whiteboard.

HOMEWORK:
Write a comment. 
Use a part/part whole diagram to solve one of these math stories:

A) I rang the doorbell 87 times today. I rang it 49 times in the morning. How many times did I ring it in the afternoon?

B) An artist painted 50 paintings. 38 of them are of boats and all the rest are of sunsets. How many paintings are of sunsets?

C) A store sells 90 cellphones over the weekend. They sold 34 on Saturday. How many did they sell on Sunday?

D) My friend and I ate 54 fruit snacks. I ate 26. How many fruit snacks did my friend eat?

SUBTRACTION WITH REGROUPING

Begin here:

1. ADDING AND SUBTRACTING USING DOUBLES FACTS

Then do these practice problems on a whiteboard:

4 + 4 =          6 + 6 =           8 + 8 =           9 + 9 =         3 + 3 =         7 + 7 =         5 + 5 =   

14 - 7 =        10 - 5 =         20 - 10 =         16 - 8 =        12 - 6 =        18 - 9 =         8 - 4 =      

14 - 8 =        12 - 7 =         20 - 11 =         16 - 9 =        10 - 6 =        18 - 10 =      14 - 8  = 

15 - 7 =        13 - 6 =         20 - 9 =           17 - 8 =        13 - 6 =        18 - 8 =        16 - 8  = 

HOMEWORK: Write a comment. Tell how a double fact helped you solve two of the yellow subtraction equations. 

IT WILL LOOK LIKE: 

"I knew the double fact ___ + ___ = ___, so I thought _____."             "First I did _______, then I did _______."

START

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