how the language of algebra helps us to express statements briefly and concisely.

Which of the following statements are true? Give reasons for your answers. 
 a) Usually the first experience of subtraction that a child has is in Class I.
 b) Primary school children of any age continue to feel the need to use concrete aids for
learning.
 c) Learning algebra helps the child to develop mathematical thinking.
 d) Children don’t get an opportunity to apply their knowledge of negative numbers till
they reach class 10.
 e) The language of mathematics is made up of the terminology and symbols used in
mathematics. 

Write “11” in base 2. Show the steps you used for doing this.

What are the advantages of using algorithms? What are the dangers that we must watch out for while illustrates them in the context of multiplication algorithm for multiplying two decimal fractions.

Explain E-L-P-S sequence of learning. Illustrate it in the context of learning the concept of “Time”.

Write down a details plan (See Unit 4) for teaching children of class 6 the concept of variable.

Do you think that the number-line is a useful tool in teaching the operation of addition and subtraction of fractions? Justify your answer.