Reading and writing numbers to 120
Count to 120 starting at any number less than 120; read and write numerals to 120
کارهایی که یادگیرنده بعد از این درس می‌تواند انجام دهد
- Count from 47 to 120 without errors
- Read the numeral 108 correctly
- Write the numeral for one hundred and fifteen
۱ · بخوان
You already know how to count to 100. Numbers past 100 work the same way. After 100, just keep counting: 101, 102, 103, all the way to 120.
Ravi reads the numeral 108. He sees 1 hundred, 0 tens, and 8 ones, so he says one hundred and eight.
To read one of these numbers, say hundred first, then the last two digits like you already know them. 115 is one hundred and fifteen.
To write these numbers, use 3 digits. The first digit is always 1, because every number here is past 100 but not yet 200.
After 100, keep counting the same way: 101, 102, 103, all the way up to 120.
برای خواندن بیشتر
Understand Place Value, Make a Number Worksheet
Counting past 100 opens a new hundred room in your number house. After 99 comes 100, a full hundred with empty tens and ones rooms. Keep marching: 101, 102, all the way to 120 without skipping a step. Point at each numeral as you say it so eyes and voice travel together.
1.1 Introduction to Whole Numbers
Big numerals read in chunks from left to right. In 108, the 1 means one hundred, the 0 holds the tens place with no tens, and the 8 means eight ones. Say it as one hundred and eight. The zero is a hero: it keeps 18 from being confused with 108.
Base ten blocks
Writing one hundred and fifteen is a listening game. One hundred plants a 1 in the hundreds room, and fifteen adds 1 ten and 5 ones. Fill every room: 1 hundred, 1 ten, 5 ones, written 115. Never write 10015: the hundred, ten and one all share a single numeral.
کاوش بیشتر
۲ · ببین
به انگلیسیدور از صفحه‌نمایش
جایگاه این موضوع
اول این‌ها را یاد بگیر
این موضوع راه این‌ها را باز می‌کند
این موضوع به کجا می‌رسد
شغل‌هایی که بر این مهارت تکیه دارند. دنبال کردن یکی برای دیدن همهٔ چیزهایی که بر آن‌ها بنا شده است.
۱۷ سؤال پشت این درس منتظرند، هر کدام با پاسخ توضیح‌داده‌شده. هر پاسخ آسمان را پر می‌کند: ستاره‌ها هنگام یادگیری روشن می‌شوند و وقتی زمان برگشتن است کمرنگ می‌شوند.