Final Cover - For Printing

Plane A plane is a flat surface which extends endlessly in all directions. The concept may be explained to the child orally. Lo ...

Horizontal / Vertical Horizontal denotes any object which is parallel to the ground. Vertical denotes an object which is at rig ...

that the meeting point of the line segments divides each other exactly into two halves and thus the meeting point is a point of ...

A sheet of paper may be given to the child. Ask the child to fold the paper to form a crease. Ask the child to fold the paper on ...

Eg. : Railway track is a fine example for parallel lines. Perpendicular lines If two lines intersect at right angles to each ot ...

NUMBERS Natural numbers The numbers 1, 2, 3,... are called as natural numbers. Natural numbers start with 1 and are increased b ...

Even numbers Numbers which are divisible by 2 without leaving any remainder are called as even numbers. Therefore, 2, 4, 6, 8, ...

Twin primes Twin primes are pairs of prime numbers which differ by 2. For example, 3 and 5, 5 and 7, 11 and 13, etc, are all tw ...

Set 1 Set 2 Set 3 Here cardinal number of set 1 is 1 Cardinal number of set 2 is 3 Cardinal number of set 3 is 7 Ordinal Number ...

The idea of digits may be explained to the child orally, as by this time he / she must have acquired some basic knowledge regard ...

The place value of 1 is 1 ones 1 The place value of 2 is 2 tens 20 The place value of 3 is 3 hundreds 300 The place value of 4 i ...

Least Common Multiple The smallest among the common multiples of two numbers is called their least common multiple. To find th ...

Perfect numbers A perfect number is one that equals the sum of its proper divisors (except the number itself as a divisor). Not ...

Therefore, the greatest common divisor of 12 and 16 = 4 Note : 1. The product of the G.C.D and L.C.M of two numbers is equal to ...

The idea of a number line is to be taught to the child orally along with the provision of a tactile number line prepared with a ...

In short, when two integers with like signs are added the result takes the same sign and when two integers with unlike signs are ...

earlier. Once the child is comfortable with the idea of a negative number, he/she may understand the idea of additive inverse ea ...

Closure property Let a and b be any two real numbers. Then, if a + b is also a real number then we say that a and b satisfy the ...

The idea may be explained to the child orally. To enhance the understanding level of the child the procedure followed in teachin ...

RATIONAL NUMBERS Rational number Any number which can be expressed in the form qp, where p and q are integers and q≠ 0 is calle ...