You’ve used the “friendly number” 10 to help solve some math problems.

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Presentation transcript:

You’ve used the “friendly number” 10 to help solve some math problems.

Today you will need….. A pencil Your math journal A hundred’s chart

Karen’s calculator broke when she dropped it down the stairs.

Karen’s calculator broke when she dropped it down the stairs. On her math homework she had the problem

Karen’s calculator broke when she dropped it down the stairs. On her math homework she had the problem Karen doesn’t think that she can solve the problem without her calculator.

Karen’s calculator broke when she dropped it down the stairs. On her math homework she had the problem Karen doesn’t think that she can solve the problem without her calculator. Can you suggest a way for her to think about the problem so that she can solve it without her calculator?

Share your ideas with a partner. Then we will take a look a way she might be able to think about this problem.

Discuss with a partner how 10 can help solve the problems below:

Think, Pair, Share How could the number 100 help you solve some problems?

It is important to be able to tell how far a number is from 100. A hundreds chart can help you.

How far is 99 from 100?

So…what might be the solution to ?

How could make 10 and some more help you with this problem? Think is the same as

Make ten and some more is also like make a hundred and some more Think is the same as

How far is 95 from 100? Use your hundreds chart if you would like. Discuss how this could this help you solve the problem ?

How far is 97 from 100? Use your hundreds chart if you would like. Discuss how this could this help you solve the problem ?

10 and 100 are not the only “friendly numbers”.

Can you think of ways you can use other “friendly numbers” to help solve the problems below?

Write two addition problems that would make use of the friendly numbers below?