Relating addition and subtraction, Mathematics

Assignment Help:

RELATING ADDITION AND SUBTRACTION :  In the earlier sections we have stressed the fact that to help children understand addition or subtraction, they need to be exposed to various situations which require them to add or subtract. Regarding this matter, we spoke to some people who are involved in studying ways in which children learn mathematical concepts. In response to this, one of them told us how he communicated addition and subtraction. What he had to say is given in the example below.

Example: Raza has been trying out different teaching strategies in a primary school for some years. According to him, children should first be made to add small numbers of toys food items, objects found around them, and so on. After enough exposure of this kind, they could be helped to develop a sense of subtraction (by methods suggested in.Sec.7.3). And while they are learning subtraction the relationship between the two operations should be brought out.

He finds that with enough experience of adding familiar objects, they would learn that, say, 3 marbles and 2 marbles are 5 marbles. With similar exposure, they would realise how much is left if you take away 3 marbles from 5 marbles. Then he helps them to relate the two operations, by first giving them, say, 3 laddus and 2 laddus and asking how many laddus they have. After this he asks them to take away 2 laddus from the 5 they have (hopefully, they haven't eaten any up!) and say how many are left. He does this kind of activity with a variety of objects - toffees, spoons, balls, and so on In this way the children learn to understand 'take away', and relate it to 'add'.

Once children have practised both these concepts in the contest of small quantities of objects, he moves them to the pictorial stage. At the same time he introduces them to the symbol '+'. After some practise with such pictures and the symbolic representation, he does the same with subtraction. For this operation, he shows them a 3 +4=7 picture like that in Fig. 5(a), and asks them first, "How many are there?'Then, in front of them he strikes out, say, two (see Fig.5 (b)), and says, "If I take away two, how many are the same time, below that he writes down 5-2 = 3 .


Related Discussions:- Relating addition and subtraction

Produce list containing m-vectors delta and lambda, The logarithm of the Po...

The logarithm of the Poisson mixture likelihood (3.10) can be calculated with the following R code: sum(log(outer(x,lambda,dpois) %*% delta)), where delta and lambda are m-ve

Decision theory, DECISION THEORY People constantly make decision...

DECISION THEORY People constantly make decisions in their private lives as well as in their work. Some decisions are qualitative in terms of their implications and signi

Semi-infinite slab solution in fourier number, Consider the temperature dis...

Consider the temperature distribution in a 1D flat plate, insulated at x = L and exposed to convective heat transfer at x = 0. On the axes below, sketch what the distribution looks

What is dividing fractions, What is Dividing Fractions? If you want to ...

What is Dividing Fractions? If you want to divide two fractions, you invert the second fraction (that is, turn it upside-down) and change the division sign to a multiplication

Find the constant height at which the jet is flying, The angle of ...

The angle of elevation of a jet fighter from a point A on the ground is 600. After a flight of 15 seconds, the angle of elevation changes to 300. If the jet is flying at a speed  o

Example of infinite interval - improper integrals, Evaluate the subsequent ...

Evaluate the subsequent integral. Solution This is an innocent enough looking integral. Though, because infinity is not a real number we cannot just integrate as norm

Calculate the net amount and distance, 1. A train on the Bay Area Rapid Tra...

1. A train on the Bay Area Rapid Transit system has the ability to accelerate to 80 miles/hour in half a minute. A.   Express the acceleration in miles per hour per minute. B

Help, sin(x)+cos(x)

sin(x)+cos(x)

Core concepts, Discuss mareketing core concepts analysing how they are used...

Discuss mareketing core concepts analysing how they are used in marketing hospitality product

What are mutually exclusive events, Q. What are Mutually Exclusive events? ...

Q. What are Mutually Exclusive events? Mutually Exclusive Events are mutually exclusive if they cannot occur at the same time. For example, if you roll one die, you canno

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd