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DEVELOPING ESTIMATION SKILLS : A study was done with some Class 3 and Class 4 children of five village schools to gauge how well they had understood the standard algorithms. The children were asked to solve problems of the type 1234 + 469. The responses were very interesting. Many of them were:
The children were; surprised by such answers. Clearly, their ability to estimate the approximate size of the answer was undeveloped. Therefore, they didn't ask themselves or, answer, "Does my answer seem reasonable?"
Why is this ability to estimate the computed result important? Don't we apply it again and again in our daily lives'? For instance, when we are buying several things, and want to quickly make sure that the total cost is within our budget, isn't this skill we use.
The ability to estimate computed results also helps us to detect arithmetical errors. Even when we use calculators, it helps us to quickly check if we haven't pressed any wrong buttons!.You can think of other ways in which this ability helps, while doing the following exercise.
find the matrix of the linear transformations T:R2->R2 defined by T(x,y,z)=(x+2y,x-3z).
find the equation to the sphere through the circle xsqaure+ysquare+zsquare+=9 , 2x+3y+4z=5
Factoring By Grouping It is a method that isn't utilized all that frequently, but while it can be used it can be somewhat useful. Factoring by grouping can be nice, however it
Evaluate following limits. Solution Therefore we will taking a look at a couple of one-sided limits in addition to the normal limit here. In all three cases notice
If 7 cosec?-3cot? = 7, prove that 7cot? - 3cosec? = 3. Ans: 7 Cosec?-2Cot?=7 P.T 7Cot? - 3 Cosec?=3 7 Cosec?-3Cot?=7 ⇒7Cosec?-7=3Cot? ⇒7(Cosec?-1)=3Cot? ⇒7(C
Prove that the Digraph of a partial order has no cycle of length greater than 1. Assume that there exists a cycle of length n ≥ 2 in the digraph of a partial order ≤ on a set A
The sum of the series 1+1/2+1/4+......is
six men and Eight boys can finish a piece of work in 14 days while eight men and twelve boys can do it in 10 days. Find the time taken by 1man alone and that by 1boy alone to fin
similar triangles diagram
(x+y+1)dy/dx=1
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