Class 1 Number System

Place Value

Before After and Between

Comparing Numbers

Number Names

Smallest Number / Biggest Number

Order of Numbers

Number System Test

Number System Worksheet

Answer Sheet

Place Value

We have single digit, two digits, three digits, etc. numbers. For single digit numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) we use only one place to write. This place is known as Ones Place.

Number Name	Ones
One	1
Two	2
Three	3
Four	4
Five	5
Six	6
Seven	7
Eight	8
Nine	9

We need two places to write two-digit numbers. 10, 11, 12, etc. are some examples of two-digit numbers. Let s consider 12 as two-digit numbers. In this case 2 is in the Ones Place, and 1 is in the Tens Place.

Number Name	Tens	Ones
Ten	1	0
Eleven	1	1
Twelve	1	2
Thirteen	1	3
Fourteen	1	4
Fifteen	1	5
Sixteen	1	6
Seventeen	1	7
Eighteen	1	8
Nineteen	1	9
Twenty	2	0

Similarly, we need three places for three-digit numbers. 100, 101, 102, 103, etc. are examples of three-digit numbers. Let s consider 103 as three-digit numbers. Here, 3 is in the Ones Place, 0 is in Tens Place and 1 is in Hundred Place.

Number Name	Hundreds	Tens	Ones
One hundred	1	0	0
One hundred one	1	0	1
One hundred two	1	0	2
One hundred three	1	0	3
One hundred four	1	0	4
One hundred five	1	0	5
One hundred six	1	0	6
One hundred seven	1	0	7
One hundred eight	1	0	8
One nundred nine	1	0	9
One hundred ten	1	1	0

Before After and Between

Comparing Numbers

Number Names

Number	Number Name	Number	Number Name	Number	Number Name
21	Twenty one	31	Thirty one	41	Forty one
22	Twenty two	32	Thirty two	42	Forty two
23	Twenty three	33	Thirty three	43	Forty three
24	Twenty four	34	Thirty four	44	Forty four
25	Twenty five	35	Thirty five	45	Forty five
26	Twenty six	36	Thirty six	46	Forty six
27	Twenty seven	37	Thirty seven	47	Forty seven
28	Twenty eight	38	Thirty eight	48	Forty eight
29	Twenty nine	39	Thirty nine	49	Forty nine
30	Thirty	40	Forty	50	Fifty