Stage 3 PROMPT sheet. 3/2 Recognise place value. 3/1 Count in multiples. 352 means /3 Numbers in words and figures

Transcription

1 hundreds tens units hundreds tens units hundreds tens units Stage 3 PROMPT sheet 3/ Recognise place value 3/ Count in multiples Now you must learn these multiples Multiples of 4 Multiples of 8 Multiples of 50 Multiples of means /3 Numbers in words and figures In order to put FIGURES into WORDS, we must try to imagine that the number is in a PLACE VALUE table like this one Hundred Ten Unit 4 One hundred forty seven One hundred and forty-seven Hundred Ten Unit Four hundred Four hundred and nine nine 3/3 Compare and order numbers 3 5 To find 0 more or 0 less, it is the tens digit that changes 0 more than 35 becomes 3 0 less than 35 becomes 34 Write numbers lining up the digits Hundred Ten Unit To find 00 more or 00 less, it is the hundreds digit that changes 00 more than 35 becomes less than 35 becomes 5 Begin at the hundreds and compare 3 is the biggest Hundred Ten Unit 4 3 Move to the tens and compare Order is: 3,,, 4

2 3/4 Estimating 3/ Add 3 digit numbers mentally Eyeball estimate Here are 0 stars Partitioning Use this to estimate larger quantities Estimate by sampling Count your pulse over 5seconds Multiply the number of pulses by 4 to get the pulse rate over minute (5 x 4 0seconds) Estimate on a number line Fill in the half way number first Then split up the half with the arrow Subtract 3 digit numbers mentally 33 - Partitioning Counting on from () Answer / Written method for addition Line up the digits in the correct columns Estimate by rounding off a number To make a sum easier and give a rough answer Example: 8 could be rounded to could be rounded to 3/5 Solve problems by estimating Example: Estimate the cost of 5 magazines at.95 each Answer: It is about 5 x 0 Example: When full this bottle holds 400ml. Estimate how much water is left in this bottle. e.g H T U Written method for subtraction Line up the digits in the correct columns e.g. 3-9 H T U ml Answer: about 50ml...?

3 tens units tenths 3/8 Estimate answers to calculations Round off each number Then do the calculation Check using the inverse Example: Estimate / Multiply & divide A -digit number by a single digit Column method x Inverse: /9 Missing number problems Fact family for +/- Grid method Partitioning method 38 x 3 30 x3 + 8 x /0 Know the 3, 4 and 8 times tables x 3 3 x 3 3 x x 3 5 x 3 5 x 3 8 x 3 8 x x 3 0 x 3 30 x 3 33 x 3 3 x 4 4 x x 4 4 x 4 5 x 4 0 x 4 4 x x x x 4 40 x 4 44 x 4 48 x 8 8 x 8 3 x x x 8 40 x 8 48 x x x 8 0 x 8 80 x 8 88 x 8 9 3/ Multiply & divide Look for connections between two sums Remember the fact family for x/ Example: x 4 4 So 0 x 4 40 So Example: 9 x 8 So 8 x 8 44 So /3 Tenths x0 x Fact family for x/ 9 x x This represents tenths 0

4 Counting in tenths (continued) A whole one divided into 0 equal parts 3/4 Write a fraction of a number of object 0 tenth or 0 0r 0. 3 are blue and are red 5 5 3/5 Use fractions as numbers A B C To find 5 of 0 we do To find 5 of 0 we do 4 x 8 A 0.8 B.9 C. To find a tenth of an object or quantity you divide by 0 Example: 0 of /4 Fraction of line or objects To find 5 3 of 0 we do 4 x 3 3/ Equivalent fractions The same fraction can be expressed in different ways ALL THESE ARE To find 5 of a line Divide the line into 5 equal parts Each part is 5 ALL THESE ARE 4 To find 5 of a set of objects Divide objects into 5 equal parts Each part is 5

5 3/ Add & subtract fractions To add and subtract fractions When the denominators are the same 5 + Do not add the denominators 3/9 Add & subtract measures The units must be the same Length Example 5-4 Do not subtract the denominators 3/8 Compare fractions metre 00centimetres 0 Fractions with the same denominator centimetre 0millimetres The bigger the numerator, the bigger the fraction Unit Fractions 3 3cm + mm 30mm + mm 3mm or 3cm mm or 3.cm 3cm 0.cm 30mm mm The bigger the denominator, the smaller the fraction Mass Example 000g 3kg 450g 3000g 450g 550g or kg 550g or.55kg

6 3/9 Add & subtract measures (continued) Volume Example 3/ Bills and change To work out a bill chocolate bar -.0 pen 0p pencil 8p Total.8 litre 000millilitres To find change by the add-on method +p +0p +50p p ml + 0ml 50ml litre and 50ml.5 litres 3/ Time Analogue clock Roman Hindu-Arabic 3/0 Perimeter PERIMETER is the distance round the outside of a shape On a centimetre square grid count round - and 4-hour clock Perimeter of this shape cm 4cm Measurements given - add up all round cm 4cm cm Perimeter of this shape cm

7 3/3 Time Reading the time Months of the year A rhyme to remember the days in each month 30 days has September, April, June and November. All the rest have 3 Except February alone, Which has 8 days clear And 9 in each leap year. the "knuckle method" 5 minutes between each number- so this time is : or we say minutes past Times of the day in -hour clock Morning.00 midnight Afternoon.00 noon.00 am.00 pm.00 am.00 pm 3.00 am 3.00 pm 4.00 am 4.00 pm 5.00 am 5.00 pm.00 am.00 pm.00 am.00 pm 8.00 am 8.00 pm 9.00 am 9.00 pm 0.00 am 0.00 pm.00 am.00 pm.00 noon.00 midnight 3/4 Time hours minutes, seconds hours x0 x0 A knuckle is "3 days", and in between each knuckle it isn't. And where your hands meet, the two knuckles are "July, August", which both have 3 days. February has 8 days & 9 days in a leap year (every 4 years) Days in a year 35 days in a year 3 days in a leap year 0 min 0 sec

8 3/5 D Shapes With 3 sides (Triangles) A B C D right-angled isosceles equilateral scalene With 4 sides (Quadrilaterals) A B C D E square rectangle parallelogram trapezium rhombus With 5 sides (Pentagons) With sides (Hexagons) regular irregular regular irregular 3/5 3D Shapes Cube cuboid triangular prism cylinder sphere cone square-based Pyramid - Nets

9 3/ Angle An angle is an amount of turn 3/ Right angles ONE right angle measures exactly 90 0 TWO right angles measure exactly 80 0 This is called a half-turn Angles in shapes Triangle - 3 angles THREE right angles measure exactly 0 0 This is called three quarters of a turn Quadrilateral - 4 angles Pentagon 5 angles FOUR right angles measure exactly 30 0 This is called a full or complete turn Names of angles ACUTE angles are less than 90 0 RIGHT angles are exactly 90 0 A square for 90 0 angle To check if an angle is bigger or smaller than a right angle, use a square corner OBTUSE angles are bigger than 90 0 This angle is greater than a right angle This angle is less than a right angle

10 3/8 Types of Lines 3/9 Bar charts Frequency table to show pets owned by Year 3 Type of pet Tally Number of pets Dog llll 5 Cat lll 3 Rabbit llll 4 Fish llll lll 8 Hamster ll The Horizon is a horizontal line A bar graph to show pets owned by Year Number of children 4 0 Dog Cat Rabbit Fish Hamster Type of pet Pictogram to show the colours in a tube of Smarties This cliff face is a vertical line The running track is parallel lines (never meet) The rise & tread are perpendicular lines (meet at 90 0 )

11 3/30 Solve answers to questions Bar chart in 3/9 (i) (ii) (iii) How many more children own a rabbit than a hamster? Answer: 4- What is the difference between the number of children who own a dog and the number of children who own a cat? Answer: 5 3 How many pets are owned altogether by the children Year 3? Answer: Pictogram in 3/9 (i) How many fewer blue smarties are there than yellow ones? Answer: 5 (ii) Work out the total number of smarties in the tube Answer: 55