Compute simple addition, Mathematics

Assignment Help:

John was doing his homework on vertical addition, and had to compute :

5 3+ 3 4  and 6 8 +45

He did the first one easily, just the way his teacher had taught him. He first added 3 and 4,.and wrote 7 beneath 4. Then he added 5 and 3, and wrote 8 beneath 3.

The next sum was also manageable. While doing it he could be heard mumbling to himself, "8 + 5 = 9, 10, 11, 12, 13. So I write 13 here (below 5). Then 6 + 4 is 7, 8, 9, I0 and so 1 write 10 (below 4)." He was satisfied with his answer, 1013. But, next day, his teacher wasn't !

His teacher tried to quickly repeat the method; he had given the class on the previous day, namely, in 68+45, since 8+5 is 13, write 3 below 5, and write 1 on the right of the problem. Then, 6 + 4 is 10, plus the 1 on the side is 11 [see Fig. 3(b)], so write 11 below 4. So the answer is 113.

Quite a few of John's classmates had made a mistake in the sum. The teacher thought it was just a matter of practice. So she gave them more exercise$ to do over a period of time. And then she moved on to discussing other concepts. Some students managed to cope with what she was teaching, and some fell by the wayside.

The following exercise is about the situation given above.

2.  According to you, what are the reasons for John's, and the other children, inability to solve the sums correctly?

If you look closely at the children's problem in Example 3, you may feel that they faced it because of their poor understanding of what the ones ten hundreds places denote. My neighbour's child, who is in Class 3, also seemed to have the same problem. I tried a method with her, which 1 shall share with you now.


Related Discussions:- Compute simple addition

Division of two like terms, Case 1: Suppose we have two terms 8ab and 4ab. ...

Case 1: Suppose we have two terms 8ab and 4ab. On dividing the first by the second we have 8ab/4ab = 2 or 4ab/8ab = (1/2) depending on whether we consider either 8ab or 4ab as the

????? ???????, ???? ????? ??????? ?? ????? ??? ?? ????? ??????? ??????

???? ????? ??????? ?? ????? ??? ?? ????? ??????? ??????

Equation of line which perpendicular to the given line, Perpendicular to th...

Perpendicular to the line given by 10 y + 3x= -2 For this part we desire the line to be perpendicular to 10 y + 3x= -2 & so we know we can determine the new slope as follows,

Determine the probability - probability example, Consider two bags, A and B...

Consider two bags, A and B, with the following contents Bag A Bag B 3 white marbles 4 white marbles 2 red marbles

Electronic whiteboards, Topic : Use of Electronic whiteboards (ICT) in prim...

Topic : Use of Electronic whiteboards (ICT) in primary education in Australia and international. What are the key theories, concepts and ideas related to your topic? Wha

Shares and divident, A man invest ?13500 partly in shares paying 6% at ?140...

A man invest ?13500 partly in shares paying 6% at ?140 and partly in 5% at 125.If he is tolal income is 560, how much has he invested in each?

How much will it have depreciated after 2 years, The value of a computer is...

The value of a computer is depreciated over ?ve years for tax reasons (meaning that at the end of ?ve years, the computer is worth $0). If a business paid $2,100 for a computer, ho

Customary units of length, Eileen needs 9 feet of fabric to make a skirt. I...

Eileen needs 9 feet of fabric to make a skirt. If Eileen has 18 feet of fabric how many skirts can she make?

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