Tuesday, October 19, 2010

Math Help

There are addition problems for homework. I wanted to give some examples of the way we have been solving them in class. The emphasis is on place value.

2 Digit Addition

A strategy we use is "breaking the numbers apart"

For example: 12 + 24

Add the tens first 10 + 20 = 30

Then add the ones 2 + 4 = 6

Add both sums together 30 + 6 = 36

3 Digit Addition

You can use the same strategy "breaking numbers apart"

For example: 327 + 112

Add the hundreds first 300 + 100 = 400

Add the tens next 20 + 10 = 30

Add the ones 7 + 2 = 9

Add all three sums together 400 + 30 + 9 = 439

*You can also use pictures to represent these problems

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