2nd Class

Numbers

Numbers Number System:

The number system contains ten digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9.
The smallest 1 - digit counting number is 1.

The largest and the smallest numbers:

The smallest 1 - digit number is 0 and the largest 1 - digit number is 9.
The smallest 2 - digit number is 10 and the largest 2 - digit number is 99.
The smallest 3 - digit number is 100 and the largest 3 - digit number is 999.

Place Value Chart: more...

Catgeory: 2nd Class

Addition and Subtraction

Addition and Subtraction Synopsis ADDITION:

Taking things (or numbers) together is called addition. + is the symbol for addition.

Thousands

Hundreds

Tens

e.g., 5 + 3 = 8 \[\downarrow \] \[\downarrow \] \[\downarrow \] Addend Addend Sum

When 0 is added to a number, the sum is the same number. e.g., 6 + 0 = 6
When 1 is added to a number, the sum is the next number. g., 4 + 1 = 5

Note:- Adding two numbers in any order gives the same sum. e.g., 3 + 5 = 8 and 5 + 3 = 8 more...

Catgeory: 2nd Class

Multiplication

Multiplication Synopsis Multiplication:

Multiplication is the same as repeated addition, x is the symbol for multiplication.
The number to be multiplied is called the MULTIPLICAND.
The number by which we multiply is called the MULTIPLIER.
The answer is called the PRODUCT.

e.g., 24 \[\times \] 3 = 72 \[\downarrow \] \[\downarrow \] \[\downarrow \] Multiplicand Multiplier Product

Note: The product of a number and zero is zero. The product of a number and 1 is the number itself. Even if the order of the number to be multiplied is changed, the product remains the same. more...

Catgeory: 2nd Class

Division

Division Synopsis Division:

Division is the reverse process of multiplication. It means grouping or sharing. It is also called repeated subtraction. - is the symbol for division.
Equal sharing or grouping means to divide the things equally without anything being left over or remaining.
The number which is divided is called the dividend. The number which divides the dividend is called the The number of times the divisor divides the dividend is called the quotient. The number of the dividend left undivided is called the remainder.

e.g., In 20 \[\div \] 5 = 4, 20 is the dividend, 5 is the divisor and 4 is quotient when 20 is divided exactly by 5. So, remainder is 0. more...

Catgeory: 2nd Class

Fractions

Fractions Synopsis

A fraction is a part of a whole.

This is one whole. One whole circle is shaded.

The circle is divided into 2 equal parts. 1 out of the 2 equal parts is shaded. That means \[\frac{1}{2}\] of the circle is shaded. We say one half of the circle is shaded. Two - halves is a whole.

more...

Catgeory: 2nd Class

Length, Mass and Capacity

Length, Mass and Capacity Synopsis LENGTH

The eraser is 3 cm long. The pencil is between 1 cm and 10 cm. The pencil’s length is 10 cm - 1 cm = 9 cm.

The lengths of objects can be measured using a ruler or a more...

Catgeory: 2nd Class

Shapes (2D and 3D)

Shapes (2D and 3D) Synopsis

Do you remember these shapes?

Formation of figures (2 - Dimensional):

more...

Catgeory: 2nd Class

Time

Time Synopsis

Time is measured using a clock. The dial of a clock is divided into 12 equal divisions marked as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12.

A clock has two hands:

(i) long hand and (ii) short hand The long hand is called minute hand and the short hand is called hour hand. Between two immediate numbers on the clock, the minute hand reads 5 minutes and the hour hand reads 1 hour.