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

Find the length of the second diagonal, Find the length of the second diago...

Find the length of the second diagonal of a rhombus, whose side is 5cm and one of the diagonals is 6cm.

Alternating series test - sequences and series, Alternating Series Test - S...

Alternating Series Test - Sequences and Series The final two tests that we looked at for series convergence has needed that all the terms in the series be positive.  Actually t

Multiply 3 (x + 4) = 3x + 12 to find out the total perimeter, Jake required...

Jake required to find out the perimeter of an equilateral triangle whose sides measure x + 4 cm each. Jake realized that he could multiply 3 (x + 4) = 3x + 12 to find out the total

Homework, joey asked 30 randomly selected students if they drank milk, juic...

joey asked 30 randomly selected students if they drank milk, juice, or bottled water with their lunch. He found that 9 drank milk, 16 drank juice, and 5 drank bottled water. If the

Area, #What is an easy way to find the area of any figure

#What is an easy way to find the area of any figure

Determine the displacement, Example: A 16 lb object stretches a spring 8/9...

Example: A 16 lb object stretches a spring 8/9 ft by itself. Here is no damping as well as no external forces acting on the system. The spring is firstly displaced 6 inches upward

Describe simplifying fractions with example, Describe Simplifying Fractions...

Describe Simplifying Fractions with example? When a fraction cannot be reduced any further, the fraction is in its simplest form. To reduce a fraction to its simplest form, div

Equations, At a bakery the cost of 30 experts is 45$. Write an equation tha...

At a bakery the cost of 30 experts is 45$. Write an equation that shows the cost of 45 cookies

Logarithms, How to solve this: log x(81) = 4

How to solve this: log x(81) = 4

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