Maths Addition and Subtraction Year One Maths Addition

Maths Addition and Subtraction Year One Maths | Addition and Subtraction | Add and Subtract Numbers | Lesson 2 of 2: Subtracting with a Part-Whole Model

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Aim • To use a part-whole model to subtract. Success Criteria 1 Lorem ipsum sit amet, consectetur elit. • IStatement can use a part-whole modeldolor to subtract numbers up to 10 adipiscing using objects. 2 • IStatement can use a part-whole model to subtract numbers up to 10 using pictures. • Sub • I can use statement a part-whole model to subtract numbers up to 10 using numerals. • I can work systematically to find all possibilities.

Remember It What do you remember about part-whole models? Check all of the numbers. The greater number shows the whole. The lower value numbers show the parts that make the whole number. 10 8 2

Remember It What does this part-whole model tell us? We added the parts to make the whole number. 6+3=9 3+6=9 9 6 3

Remember It Can you use this part-whole model to make addition calculations? Did you add the parts to make the whole number? 5+2=7 2+5=7 7 5 2

Take It Away! Can part-whole models help us subtract numbers too? 5 3 2 Have a think, a chat or make jottings your board.

Take It Away! Can part-whole models help us subtract numbers too? 9 6 9− 3=6 3 9− 6=3

Model Makers How bricks leftas fora Carl to use? Kim and Carl areare keen model makers. This ismany what it looks like calculation. Use the. They part-whole to of solve the puzzle. have a model new box bricks. 10 − 9 = 1 Look at my model! Don’t worry, I didn’t use all of the bricks. It’s great but I don’t think you left me much to build with. 10 10 10 bricks 9 1

Model Makers Kim. This found morebricks and them How are leftput forcalculations. Kim in to the use? box. ismany what itbricks looks like as Use the part-whole model to solve the puzzle. 10 − 8 = 2 10 − 2 =Thanks. 8 I think there It’s your turn to build. are some bricks left for you. 10 10 10 bricks 2 8

Model Makers This is left what it looks like as calculations. If Kim these for Carl, how many bricks did Kim use to make her model? 10 − 3 = 7 10 − 7 = 3 10 10 10 bricks 7 3

Model Makers This is it looks as calculations. If what Carl left theselike bricks for Kim, how many bricks did Carl use to make his model? 10 − 4 = 6 10 − 6 = 4 10 10 10 bricks 4 6

Model Makers If Carl left these bricks for Kim, how many bricks did Carl use to make his model? 9− 6=3 9− 3=6 9 9 9 bricks 6 3

Model Makers Can you draw a part-whole model to match the calculations? Use pictures or numbers to show your thinking. 9− 4=5 9− 5=4 Is there more than 1 way to draw the part-whole model? 9 4 5

Subtracting with Part-Whole Models Can you draw a part-whole model to match the calculations? Use pictures or numbers to show your thinking.

Diving into Mastery Dive in by completing your own activity!

Check It Can you spot the odd one out? 10 10 10 bricks 5 10 − 5 = 5 5 5 − 10 = 5 Can you explain why?

Check It Can you spot the odd one out? 10 7 10 10 bricks 3 10 − 7 = 3 10 − 3 = 7 Can you explain why?

Check It Can you spot the odd one out? 7 7 7 bricks 4 7− 5=2 2 7− 2=5 Can you explain why?

Aim • To use a part-whole model to subtract. Success Criteria 1 Lorem ipsum sit amet, consectetur elit. • IStatement can use a part-whole modeldolor to subtract numbers up to 10 adipiscing using objects. 2 • IStatement can use a part-whole model to subtract numbers up to 10 using pictures. • Sub • I can use statement a part-whole model to subtract numbers up to 10 using numerals. • I can work systematically to find all possibilities.