Reading and writing numbers to 1000
Read and write numbers to 1000 in numerals, number names, and expanded form
What a learner can do afterwards
- Read a three-digit numeral aloud correctly
- Write a three-digit number in words (e.g. 'three hundred and forty-two')
- Write a number in expanded form (e.g. 600 + 30 + 7)
The lesson
You already know that a three-digit number has a hundreds digit, a tens digit, and a ones digit. Now you will read numbers like 342 out loud, write them in words, and break them apart into hundreds, tens, and ones.
Look at 508. There are 5 hundreds, 0 tens, and 8 ones. We skip the tens word and say 'five hundred and eight'. In expanded form it is 500 + 0 + 8.
Watch out when the tens digit is 0. Do not turn the ones digit into a 'ty' word. 508 is 'five hundred and eight', not 'five hundred and eighty'.
A numeral, its words, and its expanded form all name the same number in three different ways.
Watch it
Where it sits
This opens up
Nothing builds on it yet.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.