7/31/2019 Moving Students Though Early Additive - Stage 5 MM MLC

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Moving Students through

Early Additive-Stage 5and beyond.

Presented byHelen Rodgers

With thanks to

Honor Ronowicz

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Todays MenuWhat is an Early Additive student?What knowledge do they need to know?What strategies do they need to learn?What are the keys to moving them on?

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What is an Early Additive StudentBrainstormWhat knowledge do they have?What strategies do they have?

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What knowledge would you expect themto have?

Number identification.1-1000Number sequence and ordering 1-1000Rounding of 3 digit numbers to nearest 10 or 100

Basic Facts:add sub to 20mult 2,5,10x tablesMultiples of 100 that add to 1000

Groupingswithin 100 eg 49+51of 2 in in numbers to 20 eg 8 groups of 2 in 17 with 1remainingof ten that can be made from a 3 digit number

7/31/2019 Moving Students Though Early Additive - Stage 5 MM MLC

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Early StrategiesDoubles and near doubles.Up and back through tensAddition and subtraction by grouping in 5’s Addition by looking for compatible numbers thatadd to ten, other decades or one hundredCombining and separating tens and ones .Use repeated addition to solve multiplication2,5,10 times tables

Ensure these are all in place before moving on!

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What knowledge needs to be developedNumber range 0-1000 000Sequencing and number ordering.Read and order decimals with tenths.Recall groupings within 1000

How many tens and hundreds in 4 digit numbersRound whole numbers to the nearest ten, hundred andthousandRecall groupings of 2s,3s,5, and tens in numbers to 100.All their times tables facts

Groupings of 10 and 100 that make a four digit number.Squared numbers to 100

Do you know what these all mean?

Check in Book 1 !

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Strategies to develop to move to Advanced Additive – Stage 6

Place Value partitioning.Compensating with tidy numbers.ReversibilityCompatible numbersEqual additions

Use 5 facts to work out 6,7,8 factsUse 10 facts to work out 9.Change order to make it easier. 26x3=3x26Use 2x to work out 3 ,4, 6 and 8x facts

Multiply by 10s, 100s, 1000s etcDivision by sharing and equal sets.Solve problems using a combination of addition, subtraction,multiplication and division strategies.

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Strategies to move them on

Can you give an example of each of thebelow strategies?

• Place Value partitioning.• Compensating with tidy numbers.• Reversibility•

Compatible numbers• Equal additions

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Jumping those number lines!What are they all about?

Book 5 teaching addition and subtraction.Page 33 Jumping the number line.Page 35 Problems like 23+ = 71

Page 36 Problems like 37 + = 79Page 37 Problems like + 29 =81Page 38 Problems like 73-19 =

What do you notice about the numbers?What is the same?What is different?Which strategy works best with whichnumbers ?Number properties!!

7/31/2019 Moving Students Though Early Additive - Stage 5 MM MLC

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Equal Additionsand Algebraic thinking

Book 5 Page 38

Work through the problems.Use the money or the number lines to helpyou?Have you got it???

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Algebraic thinking

Anna looked at 793-97 and said this is the

same as 796-100 even though she did notneed to work out the answer.How did she know?

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True/False97-47 = 100-44

377-69=380-72

Make up 2 of your own!

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Summary Consolidate knowledge.Ensure you have pulled apart everyproblem.

Why does it work with these numbers?Will it always work?What numbers won’t it work for?

The key is algebraic thinking.Place value and Basic facts.Practice, practice, practice.!