Base+10+Blocks+-+Place+Value

1 thousand is 10 - 1 hundred is 10 - 1 ten is 10 times 1 hundred -- times 10 ten -- times 1 one
 * 1 Thousand --- 1 Hundred --- 1 Ten --- 1 One**

Reading and Writing Numbers //** Where does each of the four (4) **ones** belong and why? How much are they worth - is the first 1 worth more than the last 1 in the number 1111? What is the value of each digit, each 1 in its **number place**? Starting with the first 1 on the left side and moving to the last 1 in the number 1111 each 1 is worth ten (10) times more (has **ten times the** **value)** than the 1 in the place to its right.
 * One Thousand One Hundred and Eleven - 1 1 1 1 **

When you add big numbers, everything is based on counting by tens and **organizing numbers in groups of ten**, (ten ones, ten hundreds, ten thousands) and moving numbers from the right to the left, **trading them into the places where they belong: the tens, hundreds, thousands and even millions places**. **The leftover numbers have to stay in place.** Working with big numbers may seem complicated when you first learn how to read, write, and actually start adding them but once you practice and understand the (place) rules and values of each number/digit you will see, soon you will be able to add millions and billions and trillions!
 * When you learn adding single-digit numbers with sums over 10 (like 5+6=)** **or numbers with multiple digits (like 55+66=)** it gets tricky when these additions do not come out to (render) perfect 10, 100, or 1000 answers. What happens with the left-over digits, the ones, the tens, and the hundreds?

Here are some tips that will help you understand, read, write, and add numbers with more than 1 digit:
 * First learn how to count by 10s and 100s and 1000s
 * Learn where each number part (digit) belongs and how much each digit is worth, what its value is.
 * Remember, always trade (move) leftover numbers from right to left, from the end of the number to the front, from the ones to the hundreds to the thousands .... to the millions ....
 * Learn how you can organize numbers with 4 digits or more with commas by arranging them in groups of three places (called periods) that are separated by a **comma .** This will help you read numbers at record speed.
 * This is how you do it:****1 1 1 1 ****count back <-- three (3) places****1, 1 1 1**

10 + 15 = 25** The 5 belongs in ones place ... the 2 belongs in the 10s place. [|The National Library of Virtual Manipulatives] (NLVM) website has an activity called "Base Block Adding" that will help you practice **organizing numbers**, **grouping digits** and "**trading**" leftovers (**remainders**) through solving addition problems. Some of you have already learned how the game works and how to use the mouse button works. If you know how to do it you can teach your friends in class how to
 * __Example of adding multiple digit numbers:__
 * How does this addition look in base blocks? Just count along:**
 * 2 tens = 20 --- + 5 ones = 5**


 * group units -- push down the mouse button and drag a box around 10 units/ones - they will automatically group 1 bar/ten
 * move the base blocks - click, hold the mouse button down and drag.

Remember the computer will give you a new addition problem on the screen every time you solve a problem correctly.** Don't forget, if you need help remembering how it all works just ask and I will show you how to next time we meet in ELL Small Group. Ms. K. :-)
 * Click on the** ** blue unit ** --> [[image:Picture_5.png width="28" height="26" link="http://nlvm.usu.edu/en/nav/frames_asid_154_g_1_t_1.html?from=topic_t_1.html"]] **to visit the NLVM base block addition website** .... give it a try!