# How to Introduce Two-Digit Addition?

Addition is one of the basic mathematical functions. When students learn addition, they first learn to add two single-digit numbers together. Once they have a firm understanding of single-digit add...
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http://www.ehow.com/how_8357572_introduce-twodigit-addition.html

## Two-Digit Addition Math Activities?

Basic addition of two one-digit numbers is one of the first math skills that children are taught. Once they master one-digit addition and place value, they are ready to progress to two-digit additi...
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http://www.ehow.com/info_8450705_twodigit-addition-math-activities.html

## Activities for Two-Digit Addition With Regrouping?

To be successful with two-digit addition with regrouping, students must have a good grasp of place value, as well as a good memory for the steps of the addition algorithm. Activities and games that...
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http://www.ehow.com/info_8212195_activities-twodigit-addition-regrouping.html

## How to Multiply Two Digit by Two Digit Numbers (Using the Count to 99 on Your Fingers Method)?

This method will allow you to multiply two digit numbers without using more than one line. If you do not know how to count to 99 on your fingers, use the wikihow link below.

http://www.wikihow.com/Multiply-Two-Digit-by-Two-Digit-Numbers-%28Using-the-Count-to-99...

## How many different seven-digit phone numbers are possible if the first digit cannot be 0 or 1?

The easiest way to solve this problem is to look at how many choices there are for each number. The first number has eight choices (all 10 digits except 1 or 2) and the other six have 10. So, the n...
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http://www.answerbag.com/q_view/2255201