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

Assumptions of interpolation and extrapolation, Assumptions The f...

Assumptions The figures known are assumed to be a normal series, that is a series without any violent, unexplained fluctuations in the values. The

The mode -measures of central tendency, The mode - It is one of the me...

The mode - It is one of the measures of central tendency. The mode is defined as a value in a frequency distribution that has the highest frequency. Occasionally a single valu

Mensuration, find the diameter of circle whose circumference is 26.51

find the diameter of circle whose circumference is 26.51

Math, a business is owned by three people.the first owns 1/12 of the busine...

a business is owned by three people.the first owns 1/12 of the business and the second owns 1/6 of the business. what fractional part of the business is owned by the third person

Statistic, The mean height of eight children is 136cm. if the height of sev...

The mean height of eight children is 136cm. if the height of seven children are 143,125,133,140,120,135 and 152,find the height of eighth student.

Comparing, compare 643,251 633,512 and 633.893 the answer is 633.512 what i...

compare 643,251 633,512 and 633.893 the answer is 633.512 what is the question

Data editing, how to remove wild points in a data set...

how to remove wild points in a data set...

Algebra, what is the answers of exercise 3.1

what is the answers of exercise 3.1

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