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  • Mary has 16 sweets and she wants to give Peter 9. How many will she have left?

Tommy says we must do it without the dots now.

  • Do the one that you understand best .

14 - 9 = 14 - 4 - 5 = ___ of 14 - 9 = ( 10 - 9) + 4 = ___

13 - 8 = 13 - 3 - 5 = ___ of 13 - 8 = ( 10 - 8) + 3 = ___

12 - 6 = 12 - 2 - 4 = ___ of 12 - 6 = ( 10 - 6) + 2 = ___

5 - 7 = 15 - 5 - 2 = ___ of 15 - 7 = ( 10 - 7) + 5 = ___

18 - 9 = 18 - 8 - 1 = ___ of 18 - 9 = ( 10 - 9) + 8 = ___

11 - 5 = 11 - 1 - 4 = ___ of 11 - 5 = ( 10 - 5) + 1 = ___

  • Complete:
  • Think!
  • Bonny and Tommy feel like doing their sums vertically .
  • The number in the top circle is found every time by adding together the numbers of the 2 circles below it, to which it is connected. Complete the number wall now.

101 * * * * * * * * * * 110

111 * * * * * * * * * * 120

121 * * * * * * * * * * 130

131 * * * * * * * * * * 140

141 * * * * * * * * * * 150

151 * * * * * * * * * * 160

161 * * * * * * * * * * 170

171 * * * * * * * * * * 180

181 * * * * * * * * * * 190

191 * * * * * * * * * * 200

  • Do the calculations below. Mark the answers in the block above. Join the numbers with a straight line, in the sequence in which you do the calculations.

1. 150 + 1 = _____

2. 160 - 1 = _____

3. 111 + 4 = _____

4. 155 - 4 = _____

5. 180 + 10 + 1 = _____

6. 190 + 5 + 4 = _____

7. 160 - 5 + 4 = _____

What do you see? ______________ How many shapes do you see?_____

Name them. _____________________________________________

Draw a line that will halve the shapes. Colour in half of every shape.

How many shapes do you see now?

Name them._____________________________________________

How many sides are there to a:

a triangle ______ , a square ______ and a rectangle ______ ?

How many angles are there to a:

a triangle ______ , a square ______ and a rectangle ______ ?

Below is an illustration of the box in which Bonny and Tommy’s pencils were packed. They wanted to know what shapes were used in making this box, so they opened it up like this.

  • Which shapes do you recognise, and how many of them are there?

____________________________________________________________________

  • Now each of you must bring a box (not too big) to school. Open it up and draw it on the other side of this worksheet. You can paste the box there later.
  • Write down which shapes and how many were used.

____________________________________________________________________

  • Use your ruler and measure the sides of each shape. Write it on our drawing. If you don’t know how to measure with a ruler, you can ask your educator or a friend to help you.
  • What do you know about the sides of a square and a rectangle ?

The sides of a square ___________________________________________________

The sides of a rectangle _____________________________________________

  • What do you know about the angles of a square and a rectangle ?

____________________________________________________________________

  • Design and make your own container in which you can put some sweets. If you don’t have cardboard, use the inside of some other big, empty container.

Today Bonny and Tommy got only half an apple each. Their mother had only 1 apple, but she divided it very carefully so that both parts were exactly the same size . She halved it.

  • We say: Bonny got one half, and Tommy got the other half.
  • Mother gave Bonny and Tommy 15 cookies to share between them. Draw the cookies in their lunch boxes.
  • How many cookies did each one get?

Each one got______________________________________.

Solve the problems in the way you prefer. You may draw them.

  • Tommy buys 13 bananas and gives half to Bonny . How many bananas did each one get?

Each one got______________________________________.

  • Bonny has a ribbon that is 29cm long. She wants to cut it in half to make 2 ribbons of the same length. How long will each ribbon be?

Each ribbon will be____________________________.

  • Tommy has to drink 17 glasses of water in 2 days. How many glasses of water must he drink on 1 day if he drinks the same amount of water each day?

He must drink _____________________________________ each day.

  • Mother bought 25 litres of fruit juice for a party, but the children drank only half of it. How many litres were left over?

There were ______________________________________________.

  • Who wants to try this ? (You may draw if you like.)

3 ½ + 3½ = ____

5½ + 5½ = ____

10½ + ½ = ____

12 +2½ = ____

Assessment

Learning Outcome 1: The learner will be able to recognise, describe and represent numbers and their relationships, and to count, estimate, calculate and check with competence and confidence in solving problems.

Assessment Standard 1.1: We know this when the learner counts forwards and backwards in:

1.1.1 the intervals specified in grade 2 with increased number ranges;

Assessment Standard 1.6: We know this when the learner solves money problems involving totals and change in rands and cents, including converting between rands and cents;

Assessment Standard 1.8: We know this when the learner can perform calculations, using appropriate symbols, to solve problems

Assessment Standard 1.9: We know this when the learner performs mental calculations;

Assessment Standard 1.10: We know this when the learner uses the following techniques:

1.10.1 building up and breaking down numbers;

1.10.2 doubling and halving;

1.10.3 number-lines;

1.10.4 rounding off in tens

Learning Outcome 3: The learner will be able to describe and represent characteristics and relationships between two-dimensional shapes and three-dimensional objects in a variety of orientations and positions.

Assessment Standard 3.1: We know this when the learner recognises, identifies and names two-dimensional shapes and three-dimensional objects in the environment and in pictures;

Assessment Standard 3.3: We know this when the learner observes and creates given and described two-dimensional shapes and three-dimensional objects using concrete materials (e.g. building blocks, construction sets, cut-out two-dimensional shapes, clay, drinking straws).

Questions & Answers

what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Mathematics grade 3. OpenStax CNX. Oct 14, 2009 Download for free at http://cnx.org/content/col11128/1.1
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