Presentation on theme: "Parents Guide to Dividing by 10 & 100"— Presentation transcript:
1Parents Guide to Dividing by 10 & 100 This Power Point Presentation will Show Parents the Language We Use When Teaching Children How to Divide By 10 and 100
2Organising numbers: We organise numbers in columns like this: H T U Hundreds Tens UnitsOnly a single figure can go into each column.
3Organising numbers:After working with Thousands, Hundreds, Tens and Units the children are introduced to larger numbersAs always, only a single figure can go into each column.HThTThThHTUHundreds of ThousandsTens of ThousandsThousandsHundredsTensUnits
4Then look at the : HTh TTh Th Organising numbers:We encourage the children to look at the numbers in groups of 3 digits.First look at the: HTUThen look at the : HTh TTh ThHThTThThHTUHundreds of ThousandsTens of ThousandsThousandsHundredsTensUnits
5Reading Big Numbers 3 5 6 HTh TTh Th H T U Hundreds of ThousandsTens of ThousandsThousandsHundredsTensUnits356The 3 noughts in the HTU says ‘thousand’Now read the HTh TTh and Th columns: 356 says ‘three hundred and fifty six’ this is the number of thousands.The complete number says:Three hundred and fifty six thousand.
6Reading Big Numbers 1 3 7 HTh TTh Th H T U Hundreds of ThousandsTens of ThousandsThousandsHundredsTensUnits137Every time we see three zeros in the HTU columns we say ‘thousand.’For the number above the number of thousands is one hundred and thirty seven.So the whole number reads:One hundred and thirty seven thousand.
7Reading Big Numbers 1 M HTh TTh Th H T U MillionsHundreds of ThousandsTens of ThousandsThousandsHundredsTensUnits1After some practice with hundreds of thousands, the children are introduced to millions.We point out that to have a million we need one figure plus 6 zeros.To make the larger numbers we use a space to separate each group of 3 numbers.one milliontwo million
8Hundreds Tens Units Decimal Point tenths hundredths Dividing by 10TThThHTUthTens of ThousandsThousandsHundredsTensUnitstenthshundredthsTo divide by ten we move the figures one place to the right to make the number smaller.The decimal point never moves.We read the colums like this:Hundreds Tens Units Decimal Point tenths hundredths
9We say:”There’s one zero in ten so we move one place.” Dividing by 10TThThHTUthTens of ThousandsThousandsHundredsTensUnitstenthshundredths32We say:”There’s one zero in ten so we move one place.”32 divided by 10 is: 3.2TThThHTUthTens of ThousandsThousandsHundredsTensUnitstenthshundredths32
10Dividing by 10 4 H T U t h 3 4 3 2 2 432 divided by 10 is 43.2 432 divided by 10 is 43.2We have moved each digit one place to the right to divide by ten.We read the answer by saying, ‘forty three point two.’
11Another Example H T U t h 6 6 1 1 61 divided by 10 is 6.1 61 divided by 10 is 6.1We have moved each digit one place to the right to divide by ten.We read the answer by saying, ‘six point one.’
12Finding 10% H T U t h 5 5 7 7 We use this same method to find 10%. We use this same method to find 10%.10% of 57 is 5.7We read the number as five point seven
13Dividing by 100 TTh Th H T U t h Tens of ThousandsThousandsHundredsTensUnitstenthshundredthsTo divide by hundred we move the figures two places to the right to make the number smaller.We say, “There are 2 noughts in one hundred so we move 2 places.”
14Dividing by 100297H T U t hThis time we move the figures 2 places to the right because there are 2 noughts in 100.We read the number as two point nine seven
15Multiplying by 10 2 Th H T U t h 9 2 9 7 7 Th H T U t hThis time we move the figures 1 place to the left because multiplying makes the number bigger.Notice that a zero needs to be added into the units column as the movement of the digits has left this column empty.
16Multiplying by 100 2 HTh TTh Th H T U t h 9 2 9 7 6 7 6 HTh TTh Th H T U t hThis time we move the figures 2 places to the left because there are two noughts in 100.
17Multiplying & Dividing by 10, 100 & 1000 M HTh TTh Th H T U t h thThe same method is used for multiplying and dividing by 10, 100 & We use the amount of noughts in the number to remind us of how many spaces to move each digit.Multiplying / Dividing by:Move 1 placeMove 2 places1000 Move 3 placesRemember : the decimal point never moves
18Click Below to Return to Our School Website. We hope this powerpoint will help you to work with your child at home.Please ask in school if you have any questions regarding our approach to teaching maths.