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+ 4 % 1 ¼ 3 ÷ ¾

×
Chapter5 6 ½ –

Numbers Upto 20

Tens and Ones

Kartik has Riya gave Now Kartik

9 pencils. him one more. has 10 pencils.

So you can say that one more than nine is ten.

Hence, 9 + 1 = 10

Now Kartik put these 10 pencils in a box.

=

Here 10 ones make 1 ten.

Symbols used to write numbers are called
numerals or digits.

Numbers 0, 1, 2, ..., 9 are 1-digit numbers
where 9 is greatest one-digit number.

Number 10, 11, ... are two-digit numbers, 10

is smallest two-digit number.

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Mathematics In Focus - 1