### Are You Getting Ready to Start Teaching Rounding to Estimate Differences?

If you are teaching Rounding to Estimate the Difference, I've got some great lessons, tips, resources and freebies for YOU!

A quick way to estimate the difference of two numbers is to round each number and then subtract the rounded numbers. {See this previous post for help on rounding.} More often than naught, this won't be the exact answer but it may be close enough for some purposes. Students need this mental math not only for future math classes and math procedures, but it is also an excellent life skill. Do you have enough money for all your groceries? Did the cashier give you the right amount of change back? When you relate math to MONEY, even eight year old ears perk up! Problem solving extends to all aspects of their world.

Once your students have a strong foundation of rounding, you can move on to estimating the difference. Estimation is a powerful mathematical mental tool to be used both in solving problems and in checking the answer to see if it is reasonable.

How to estimate a difference by rounding:
• Round each number in the problem.
• Subtract the rounded numbers together, mental math is even better.
More reasons WHY you would use rounding to estimate the difference:
• Check to see if you have about enough money to pay for your meal at restaurant before you order. Lobster or hamburger?
• Get a ball park idea to double check your answer to a problem. Is 300 an intelligent answer for 992 - 682?

Once you're done with your lesson, I have a variety of resources to help with your spiral review, use them in your math centers, small group lessons, seat work, partner work, the possibilities are endless!

Math Center

Color By Numbers

Task Cards Also Come With an Easy to Print Black and White Version... Perfect for Colored Paper.

This Task Card Resource Also Includes an
Answer Key / Student Self Checking Sheet!

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### Owl Themed Student Binder Covers For Your Classroom Organization

This resource comes with the
following student binder covers:

Language Arts Folder,   Take Home Folder,   Phonics Folder
Science Folder,   Social Studies Folder,   Writing Folder
Work Station Folder,   Center Folder,  Word Work Folder
Spelling Folder,   Vocabulary Folder,    Reading Group Folder
Math Folder,   Homework Folder,   Reading Folder

Use a different character/color for your middle group, etc.

* Helps the children learn organizational skills, no more papers shoved into their desks.

You can print them on colored paper with black ink only to save money and they turn out just as adorable!

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to know when I publish new resources and freebies!

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### New Fall Themed Counting Numbers 0 - 10 Task Cards For Your Classroom

I've created some new task cards this week that are just as cute as can be!! Counting numbers 0 - 10 and I've included a recording sheet and number cards for a variety of uses.

These task cards are wonderful for your small groups, centers, tutoring, scoot, read the room, homework, seat work, so many ways to use these task cards that the possibilities are endless. Your students will enjoy the freedom of task cards while learning and reviewing important skills at the same time! Students can match the answers with the included number cards, or on white boards. They can write the answers in your classroom journals or the included recording sheet. Perfect for an assessment grade for the week.

Recording Sheet and Answer Key Included

Addition Numbers Cards Are Also Included

Addition Numbers Cards Are Also Included
Here's one of my favorite tips... I store my task cards in these FREE Rubbermaid containers....you know the ones that lunch meat come in? I love them, they are a perfect size for task cards and then the container doesn't go to waste.

Perfect for Independent Work or Center Time

Here is each individual set of task cards, as well as the bundle.

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### Do You Teach Using Place Value to Add?

Children learn at an early age that numbers simply go on and on, rote counting to a point of boredom or if they are counting items, counting until they run out of items. As they mature, we need to teach them an easier way of counting items, by using the built in system of GROUPS AVAILABLE, groups of tens, hundreds, thousands, etc.

Once they have the basics of addition or adding these groups, they are ready to break apart larger numbers to be able to count them in groups, for ease, for speed, simply for a higher understanding of mental math.

For example:

Many adults do this automatically in their head, we look at the hundreds, tens and ones, add them quickly and then add them all to get a final total.

Even with ones rolling into tens, and tens rolling into hundreds, this is still an easy and effective way to solve problems with three and four digit numbers. But, it is a skill that has to be taught. Most math standards introduce this skill in second grade with tens and ones, then introducing thousands in third grade.

Using Place Value to Add with a Hands-On Lesson:
Give your small groups multiple bundled items....
1. Coffee stirs or straws banded into hundreds, tens and ones with rubber bands or twist ties.
2. Quart bags with 100 beans, snack bags with 10 beans, and beans {ones} not in baggies.
3. Macaroni in baggies. Anything that you can buy inexpensively in bulk works.
4. Base Ten Counting Blocks, etc.
Give them many problems to work out with and without regrouping of their items.

Another Using Place Value to Add Lesson:
An excellent way to introduce or review this skill is with partners and white boards. Let each student write a problem on their board, {or for a more GUIDED LESSON, you write two set problems on the overhead camera} then the students exchange white boards and solve the problem using the expanded place value method.
Allow time for multiple problems and math practice.

I've created multiple resources to help with this skill.

I like to use this center to also reinforce the students' calculator skills. Do you have mobile devices? iPhones? iPads? Whip them out and use the calculator app with this center. Students can also use paper and pencils, or white boards, but calculators add a bit of fun too!
These highly engaging center games are quick and easy to prep and can be used for a variety of games... concentration, match game, go fish, gin rummy, scoot, read the room, self checking, even perfect for assessments. Your center time can run smoothly and with very little prep from you!

Your students will adore these Color Your Answer worksheets while learning and reviewing place value, break apart method addition skills at the same time! You will love the no prep, print and go ease of these printables. As always, answer keys are included.

This resource includes:
Page 1 - Color by Code No Regrouping
Page 2 - Color by Code with Regrouping
Page 3 - Color by Code Mixed Regrouping and No Regrouping
Page 4 - Multiple Problems Worksheet No Regrouping
Page 5 - Multiple Problems Worksheet With Regrouping
Pages 6 - 10 Matching Answer Keys

Pages 4 and 5 are perfect for a weekly assessment grade.

Another fun way to use this center is with place value dice. The students can lay out the matching dice, work each group, ones, tens, and hundreds, then I tell them to "go to the bank" {the container,} and get the correct dice they need for the answer. They can add dice to the column when there is regrouping too. Just something a little different, but keeps them up and moving and with a hands-on extra activity. This activity is fun to model in small group and then a week later use it at your math center as a spiral review.

FIVE printables that are made to be an additional resource for any math series. Use them for your math center, small group, RTI pull out, seat work or homework. FIVE answer keys are also included.

I like to make my centers self-correcting. You can use matching stickers or symbols on the back. It works really well on card stock and laminated cards!

Task Cards are Also Available for This Skill

Today's Lesson: