Class 5

?Class 3Concept(s) to be covered: Column addition of 2 3 digit numbers* adding three?*recognise and use the?inverse relationship?between addition and?subtractionMonMental Oral StarterPractice inverse operation calculationsEasy - ? - 7 = 13Medium - ? + 4 – 6 = 20 Harder ? + 3 – 4 + 5 = 25Repeat with different calculationsCan I add two 3 digit numbers using the column method?Can I add 2 three digit numbers without crossing a boundary? fCan I add 2 three digit numbers by crossing the 10 or 100 boundary? fCan I solve problems involving adding crossing the 10/100 boundary? ps AfL Start with a simple 2 + 2 digit column method calculation where the children have the answer and need to work out the 2 numbers that have to be added. KQ – How did you know what numbers could go in each column? How did you know what numbers couldn’t go in each column? Could you have two digits that equal 10 or more? Why?Recap the column method for 2 digits. KQ – Do you think it is possible to use this method for adding 2 3 digit numbers? Why? Demonstrate how to add 2 three digit numbers. 345 + 323. KQ – Is this an easy or hard calculation? How do you know? How could you make the calculation more tricky? Demonstrate how to add 2 3 digit numbers 358 + 391. KQ – What happens if the numbers in the largest column go over 10?Give the children the chance to try themselves. Those children who get it get started on a worksheet. Those who need more input stay. Go through the method again with the children practising as the method is taught.WTCB – Working on worksheet with no carrying Encourage children to work out the adding of each digit mentally without a 100 square or number line.AREWorking on sheet with carryingGDWorking on working sheet with carryingKey vocab:Addition, more, column, digit, boundaryPlenaryWhat are the 2 largest numbers that you can add together with out crossing into the next boundary?ResourcesClass 3Date: 3.11.20Concept(s) to be covered: Column additionrecognising odd and even numbers?Adding 3 digit numbersTuesMental Oral StarterOdd and even numbersSort the numbersGive the children a selection of numbers. The children have to sort them into odd and even numbers.KQ – How do you know if they are odd or even?Can I add two 3 digit numbers using the column method?Can I add 2 three digit numbers by crossing the 10 or 100 boundary? FCan I add 2 three digit numbers by crossing the 10 and 100 boundary? FCan I solve simple problems involving adding crossing the 10/100 boundary? psCan I solve problems involving adding crossing the 10/100 boundary? PsAfL – Write 3 calculations on the board which are wrong. KQ – Which ones are wrong and why? Recap the method of addition. Introduce children to the idea that both boundaries can be crossed. Demonstrate how to do this using 456 + 668. Allow the children to have a go with a couple of calculations. KQ- What is important to remember when doing these calculations? Why is it important? If the children get them correct, have a go at 5 calculations on the board before moving on to mastery level work. Those children that require more input work with class teacher to practice the skills. Teacher models then children have a go. Once children have grasped concept, work independently on calculations. WTUsing bar models given, children write all the calculations that they can think of. AREWork through the first 5 sums, if the children get them all right move on to mastery level. as ARE. Key vocab:Hundreds, tens, ones, add, more, similar, differentPlenaryDiscuss how to solve these calculations and then model how to answer these questions using evidence.ResourcesTwinkl worksheetsClass 3Date: 4.11.20Concept(s) to be covered: Word problems using additionWedMental Oral StarterGive each child a dice. Children can choose their level.Easy – Roll the dice once to give single digit. How many to twenty?Medium – Roll the dice twice to make a two digit number? How many to make 100?Hard – Roll the dice three times to make a three digit number. How many to make a 1000?Can I solve word problems using an efficient method?Can I solve simple word problems using concrete or pictorial methods? Can I solve word problems using an effective method?Can I use the column method correctly for addition?Can I solve addition problems which are more complicated? Introduce an addition problem to the children.There are 36 green pens in the pen box. Mrs Holt adds 53 more. How many pens altogether?KQ – What sort of problem is this? How do you know? (Look at the vocab used) KQ- What other words could we use that show addition? (sum, total, plus, increase) Show the children how the word problem below. Discuss how it uses different words but means the same.There are 36 green pens in the pen box. Mrs Holt increases the pens by 53. What is the total number of pens?KQ – How would you solve this problem? Discuss with a partner. Talk about all the different methods that the children could use. KQ – Which is the best method? What do we mean by the best method? Introduce the word efficient to the children and explain what it means.Give children the opportunity to try the word problem below in pairs. There are 365 sticks in the outdoor area, plus 156 by the robin’s nest. Miss Daniels then increase it by 312. What is the sum?KQ- Is it harder or easier than the word problem before? Why? What do you need to do to help you solve it?Read it, underline key vocab, recognise which calculation you need, estimate, choose method, check answer.Work through sum together as a class. (WT children could use a calculator to check the answer)KQ- What could you do if you were finding it tricky? (Draw it using dienes or place value chart or use apparatus) Demonstrate how to use this to help the children solve it.WT - Teachers support to read the problemChallenge cards – addition onlyEncourage children to use written method as opposed to using 100 square.AREWorksheet – 1 step problemsGDWorksheet – 2 step problemsKey VocabAddition, carrying, column, tens, hundreds, ones, number line, dienes, place valuePlenaryWhat did you find tricky? What helped you?ResourcesWorksheetsClass 3Date: 5.11.20Concept(s) to be covered: Subtraction of a 2 digit numberThursMental Oral StarterGive children a 2 digit number:WT – 20ARE – 100GD -78Children have to role a dice to create a 2 digit number (WT a single digit) which they have to subtract from their number. How many can they complete in 5 minutes?Can I subtract a 2 digit number from a 2 digit number crossing the tens boundary?Can I subtract a 2 digit number from a 2 digit number not crossing the tens boundary?Can I subtract a 2 digit number from a 2 digit number crossing the tens boundary?Can I exchange a ten correctly?Can I solve problems involving subtracting a 2 digit number?Write down 67 - 42, 86 - 29, 46 - 86, 134 - 77. In pairs the children have a go at solving them. KQ- Which is the hardest one and why? What method did you use to help you solve them? Share examples with the class. KQ – Did you find the one that didn’t work? Why do you think this was? Impress on the children the importance of the largest number being first. AfL – Show children that 86 – 46 = 40 can be written as 40 = 86 – 46. Talk about why this is important – the fact that subtraction is not commutative, it can only go one way.Explain to the children we are going to use the column method again today but to subtract instead. Remind the children that we used that method before that it was important that they show their working and not do it all in their heads.Using the calculations above, demonstrate how to use the column method, encouraging the children to have a go as it is demonstrated. KQ - Which is the hardest and why? Talk about how it is best to use an efficient method and that column subtraction isn’t always the most efficient of effective way. KQ – Can you think of a subtraction calculation where the column method would not be efficient?GD – Children go off to start activity while the other children watch another demonstration of the method.WT2 digit subtract 2 digits not exchanging ARETwinkl worksheet 2 digit subtract 2 digits – exchanging GDTwinkl worksheet 2 digit subtract 2 digits – exchangingKey VocabSubtract, exchange, column, hundreds, tens, onesPlenaryResourcesWorksheetClass 3Date: 6.11.20Concept(s) to be covered: Subtraction of a 3 digit numberFriMental Oral StarterCounting stick x2 Counting up and back at speedCan I subtract a 3 digit number from a 3 digit number crossing the tens boundary?Can I subtract a 2 digit number from a 2 digit number crossing the tens boundary?Can I subtract a 3 digit number from a 3 digit number crossing the tens boundary?Can I exchange a ten correctly?Can I move to the next column if there is a zero?Can I exchange in 2 columns?Can I solve problems involving subtracting a 3 digit number?AfL -Show 3 subtraction sums, each with a mistake. KQ - Can you work out what the mistake is? Discuss the errors and why they may have been made. KQ – What should the answer have been?KQ- If I was subtracting a three-digit number from a three-digit number how might my calculation change? Demonstrate how to solve a subtraction sum with three digits 456 - 361, then allow the children to have a go with a different sum 365 - 149. Children feedback to the class. KQ – How are these sums different? Give the children 3 sums to have ago at. If the children get them right, they can move on to independent work. Those children who are still struggling continue to work with teacher, practising the skills.Pit–stop plenaryShow the children what to do if there is a 0 in one column and they need to exchange.Give the children a couple of sums to practice with. WT2 digit subtract 2 digit with exchange ARETwinkl sheet 3 digit subtracting 3 digit with exchangeGDTwinkl mastery worksheet Key VocabSubtract, exchange, column, hundreds, tens, onesPlenaryResources ................
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