AMH - 38__number_systems.38_write_numbers

Here is how you write the multiples of $10$ up to $100.$

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$\downarrow$

$10$ ten

$20$ twenty

$30$ thirty

$40$ forty

$50$ fifty

$60$ sixty

$70$ seventy

$80$ eighty

$90$ ninety

$100$ one hundred

For numbers $20$ or higher, the name of the number is the name of then tens followed by a dash and the name of the ones.

$20$

Example: Write the name of $45$ in words.

There is a $4$ in the tens place. It represents $40$ . There is a $5$ in the ones place. So, the name of the number in words is forty-five.

Example: Write the name of $77$ in words.

There is a $7$ in the tens place. It represents $70.$ There is also a $7$ in the ones place. So, the name of the number in words is seventy-seven.

For numbers in the hundreds, the name of the number is one hundred followed by the number in the tens and ones places.

Example: Write the name of $189$ in words.

There is a $1$ in the hundreds place. It represents $100$ and is written one hundred.

There is an $8$ in the tens place. It represents $80$ and is written eighty.

There is a $9$ in the ones place. It is written nine.

The number $189$ is written one hundred eight-nine.

Example: Write the name of $112$ in words.

There is a $1$ in the hundreds place. It represents $100$ and is written one hundred.

There is an $1$ in the tens place. It represent $10.$ Since it is less than $20,$ we need to look at the ones place.

There is a $12$ in the tens and ones places. It is written twelve.

The number $112$ is written one hundred twelve.