# Unit E

This unit is the foundation for important concepts dealing with place value, counting numbers to 120, and money.

In Unit E, we will use what we have learned about place value (tens and ones) to show numbers in more than one way.  Look at the examples below.

Students should be expected to count on from any number less than 120 and also read, write, and represent any number to 120.

• Start at 47 count forward until you get to 63.
• Start at 7 and count by tens until you get to 37.
• Start at 109 and count backwards  until you get to 87.

We will also work on MENTALLY ADDING and SUBTRACTING 10. Students should recognize that, when adding or subtracting 10, the only digit that is affected is the digit in the tens place.  The number in the ones place will remain the same.

This unit is an introduction to MONEY where we will:

• Identify the value of coins (pennies, nickels, dimes, quarters)
• count combinations of coins (pennies, and/or dimes)
• Show the value of one dollar with coins in a variety of ways. 100 pennies, 20 nickels, 10 dimes, 4 quarters.

### What You Can Do at Home

Trip to the Market:  Take your child to a market and have him or her show the prices of different items that are under a dollar using coins. Then reverse the activity by giving your child a group of coins and having him or her find an item in the store that costs the same amount. Encourage your child to count out loud and use different strategies such as skip-counting, counting on, and grouping.

Give a Penny, Take a Penny:  Give your child a large group of pennies. Then have him or her group them into fives, tens, or twenty-fives to practice grouping and skip-counting. Help him or her write an addition sentence to show the groups and find the total. You can repeat the activity using different groups of the same coins.

Think Central Animated Math Grade 1 skills: 32, 33, 34

## Look at What’s Next (2nd Grade)

The concepts/skills taught in this unit are preparing your child for 2nd grade.  Take a look at what’s next…

MAFS.2.MD.3.8

• Solve one- and two-step word problems involving dollar bills (singles, fives, tens, twenties, and hundreds) or coins (quarters, dimes, nickels, and pennies) using \$ and ¢ symbols appropriately.

MAFS.2.NBT.2.8

• Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.